Establish the current Robo Tracker population-served value and its recent growth rate, then use the weighted sub-question probabilities (tracker continuity, moderate growth, new-metro launches, explosive-growth tail) to shape a lognormal growth-multiple distribution applied to the current base, yielding percentiles for the numeric forecast.
## Cross-Market Signals ### Polymarket - "Will there be no change in Fed interest rates after the September 2026 meeting?" → Yes: 0.45, Volume: $2.8M - "Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.03, Volume: $2.5M - "Will the Fed increase interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.53, Volume: $1.9M - "Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.01, Volume: $1.0M - "Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.02, Volume: $886.7K - "Will Russia capture Havrylivka by September 30, 2026?" → Yes: 0.05, Volume: $101.0K - "Will Russia capture Mala Tokmachka by September 30, 2026?" → Yes: 0.09, Volume: $255.2K
1. [sq1 | web_search | MODERATE cred 60 | UP | DATED] Robo Tracker's leaderboard is an actively maintained site with documented FAQ methodology (census-tract intersection) and was updated in early 2026 to focus on active services.
2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | RECENT] Crawled robotracker.app/leaderboard pages returned only placeholder fields ('mi² population'), so no current numeric Waymo population-served figure was retrieved.
3. [sq2 | web_search | STRONG cred 70 | NEUTRAL | DATED] Robo Tracker counts only services fully open to the public with no waitlist, no safety monitor, and adequate fleet size, excluding pilot/waitlist launches.
4. [sq2 | article_search | STRONG cred 92 | UP | DATED] Waymo raised a $16 billion round in February 2026 at a $126 billion valuation, explicitly to fund continued market expansion.
5. [sq2 | web_search | STRONG cred 85 | UP | RECENT] Waymo reported over 20 million lifetime trips and ~3,000 robotaxis by May 2026, targeting 1 million paid rides per week by end of 2026.
6. [sq2 | article_search | MODERATE cred 88 | UP | DATED] Waymo began deploying its sixth-generation 'Ojai' driverless platform in February 2026, described by the company as the primary engine for its next expansion era.
7. [sq3 | web_search | STRONG cred 88 | UP | DATED] Waymo operated in 10 U.S. metro areas by February 2026, having added Dallas, Houston, San Antonio, Orlando and Miami to its five original markets.
8. [sq3 | article_search | MODERATE cred 85 | DOWN | DATED] In February 2026 Waymo announced it was only 'laying the groundwork' in Boston and Sacramento, with no service start date given.
9. [sq3 | article_search | MODERATE cred 82 | DOWN | DATED] Waymo's Toronto effort as of April 2026 was at the testing/permission stage, facing regulatory and winter-weather obstacles.
10. [sq3 | article_search | WEAK cred 40 | NEUTRAL | VERY_RECENT] No articles between February and July 2026 in the retrieved set announced a new fully public Waymo metro launch after the early-2026 batch.
11. [sq4 | article_search | MODERATE cred 90 | UP | VERY_RECENT] IIHS study (July 2026) found Waymo vehicles in 68% fewer police-reported crashes than human drivers, reducing likely regulatory friction to expansion.
12. [sq4 | code_execution | WEAK cred 30 | NEUTRAL | VERY_RECENT] Monte Carlo of an 8-month lognormal growth multiple yields median ~38M population served, 5-95% range ~18M-80M, with P(>1.5x)=0.70 and P(>3x)=0.15.
## Cross-Market Signals
### Polymarket
- "Will there be no change in Fed interest rates after the September 2026 meeting?" → Yes: 0.45, Volume: $2.8M
- "Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.03, Volume: $2.5M
- "Will the Fed increase interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.53, Volume: $1.9M
- "Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.01, Volume: $1.0M
- "Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.02, Volume: $886.7K
- "Will Russia capture Havrylivka by September 30, 2026?" → Yes: 0.05, Volume: $101.0K
- "Will Russia capture Mala Tokmachka by September 30, 2026?" → Yes: 0.09, Volume: $255.2K
Information gaps:
- No actual Robo Tracker Waymo population-served number for early 2026 or mid-2026 (the required base value)
- No historical time series of Robo Tracker population figures to estimate monthly growth rate
- No confirmation of which 2026 metros meet Robo Tracker's no-waitlist/no-monitor criteria
- No data on freeway/airport/whole-metro service-area expansions in 2026
Key uncertainties:
- Whether tracker counts only qualifying fully-public metros vs. all service areas
- Timing of Boston, Sacramento, Detroit, Nashville, DC-type launches before Sept 1
- Size of service polygons in new Sun Belt metros (large area vs. dense population)
- Possible methodology change or site downtime at Robo Tracker
You are an elite superforecaster. Produce a probability distribution over the answer to this Metaculus numeric question.
## Question
What will be Waymo's population served on September 1, 2026?
## Description / Resolution Criteria
## Description
Gizmodo: [Waymo’s Coverage Area Is Growing and Will Soon Be Larger Than Rhode Island](https://gizmodo.com/waymos-coverage-area-is-growing-and-will-soon-be-larger-than-rhode-island-2000758726)
`{"format": "bot_tournament_question", "info": {"hash_id": "d6d855137ea867e8", "sheet_id": "125"}}`
## Resolution Criteria
This question resolves as the total population served of Waymo on September 1, 2026, according to the Robo Tracker [Robotaxi Leaderboard](https://robotracker.app/leaderboard).
## Fine Print
No other resolution source will be used, and this question will resolve exactly as the number displayed by the resolution source.
## Range
The answer must be a number in [7000000, 10000000] (units: people).
## Sub-question decomposition (planner)
- (w=0.15) Will the Robo Tracker Robotaxi Leaderboard still be operational and display a Waymo 'population served' figure on September 1, 2026? — Resolution depends entirely on a single third-party tracker; a definition change, methodology revision, or site shutdown
- (w=0.30) Will Waymo's population served on the Robo Tracker leaderboard on Sept 1, 2026 be at least 1.5x its value as of early 2026? — Captures the base-case continuation of Waymo's rapid geographic expansion (new metros: Dallas, Denver, Nashville, Miami,
- (w=0.30) Will Waymo have launched public (non-waitlist) rider service in at least 5 additional new metropolitan markets between January 2026 and September 1, 2026? — New metro launches are the primary step-function driver of population-served; each large metro can add millions to the c
- (w=0.25) Will Waymo's population served on Sept 1, 2026 exceed 3x its early-2026 value (i.e., an explosive expansion scenario including freeway/airport/whole-metro coverage expansions)? — Defines the upper tail; whether Waymo expands service polygons to entire metro regions rather than incremental suburbs d
## Synthesized evidence
1. [sq1 | web_search | MODERATE cred 60 | UP | DATED] Robo Tracker's leaderboard is an actively maintained site with documented FAQ methodology (census-tract intersection) and was updated in early 2026 to focus on active services.
2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | RECENT] Crawled robotracker.app/leaderboard pages returned only placeholder fields ('mi² population'), so no current numeric Waymo population-served figure was retrieved.
3. [sq2 | web_search | STRONG cred 70 | NEUTRAL | DATED] Robo Tracker counts only services fully open to the public with no waitlist, no safety monitor, and adequate fleet size, excluding pilot/waitlist launches.
4. [sq2 | article_search | STRONG cred 92 | UP | DATED] Waymo raised a $16 billion round in February 2026 at a $126 billion valuation, explicitly to fund continued market expansion.
5. [sq2 | web_search | STRONG cred 85 | UP | RECENT] Waymo reported over 20 million lifetime trips and ~3,000 robotaxis by May 2026, targeting 1 million paid rides per week by end of 2026.
6. [sq2 | article_search | MODERATE cred 88 | UP | DATED] Waymo began deploying its sixth-generation 'Ojai' driverless platform in February 2026, described by the company as the primary engine for its next expansion era.
7. [sq3 | web_search | STRONG cred 88 | UP | DATED] Waymo operated in 10 U.S. metro areas by February 2026, having added Dallas, Houston, San Antonio, Orlando and Miami to its five original markets.
8. [sq3 | article_search | MODERATE cred 85 | DOWN | DATED] In February 2026 Waymo announced it was only 'laying the groundwork' in Boston and Sacramento, with no service start date given.
9. [sq3 | article_search | MODERATE cred 82 | DOWN | DATED] Waymo's Toronto effort as of April 2026 was at the testing/permission stage, facing regulatory and winter-weather obstacles.
10. [sq3 | article_search | WEAK cred 40 | NEUTRAL | VERY_RECENT] No articles between February and July 2026 in the retrieved set announced a new fully public Waymo metro launch after the early-2026 batch.
11. [sq4 | article_search | MODERATE cred 90 | UP | VERY_RECENT] IIHS study (July 2026) found Waymo vehicles in 68% fewer police-reported crashes than human drivers, reducing likely regulatory friction to expansion.
12. [sq4 | code_execution | WEAK cred 30 | NEUTRAL | VERY_RECENT] Monte Carlo of an 8-month lognormal growth multiple yields median ~38M population served, 5-95% range ~18M-80M, with P(>1.5x)=0.70 and P(>3x)=0.15.
## Cross-Market Signals
### Polymarket
- "Will there be no change in Fed interest rates after the September 2026 meeting?" → Yes: 0.45, Volume: $2.8M
- "Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.03, Volume: $2.5M
- "Will the Fed increase interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.53, Volume: $1.9M
- "Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.01, Volume: $1.0M
- "Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.02, Volume: $886.7K
- "Will Russia capture Havrylivka by September 30, 2026?" → Yes: 0.05, Volume: $101.0K
- "Will Russia capture Mala Tokmachka by September 30, 2026?" → Yes: 0.09, Volume: $255.2K
Information gaps:
- No actual Robo Tracker Waymo population-served number for early 2026 or mid-2026 (the required base value)
- No historical time series of Robo Tracker population figures to estimate monthly growth rate
- No confirmation of which 2026 metros meet Robo Tracker's no-waitlist/no-monitor criteria
- No data on freeway/airport/whole-metro service-area expansions in 2026
Key uncertainties:
- Whether tracker counts only qualifying fully-public metros vs. all service areas
- Timing of Boston, Sacramento, Detroit, Nashville, DC-type launches before Sept 1
- Size of service polygons in new Sun Belt metros (large area vs. dense population)
- Possible methodology change or site downtime at Robo Tracker
## Required pre-forecast walkthrough
Before giving percentiles, address these explicitly in your rationale:
(a) The time left until the question resolves.
(b) The outcome if NOTHING changes from today (the status quo value).
(c) The outcome if the CURRENT TREND continues.
(d) The expectations of experts / markets / base rates.
(e) A plausible scenario that produces a LOW outcome (near p10).
(f) A plausible scenario that produces a HIGH outcome (near p90).
## Calibration guidance
- **Be humble about tails.** Good forecasters set WIDE 90/10 intervals to account for unknown unknowns. Narrow tails get punished by the log score far more than slightly-biased medians.
- **Status quo anchoring.** The p50 should be close to the status quo value unless you have strong evidence of a trend.
- Don't pile mass at one value — if you're tempted, widen the spread by 20-50%.
- **Anchor on markets/experts.** If liquid market prices, analyst forecasts, or community percentiles appear in the evidence, center your distribution on them and widen — don't override a liquid market without specific evidence it lacks.
- **Relative-return / spread questions ("how much will X's return exceed Y's").** A near-zero median is usually right, but size the TAILS to the more VOLATILE leg, not to a generic 2-3pp spread. Two broad equity indices (e.g. Nasdaq-100 vs S&P 500) do stay within roughly ±2-3pp over a two-week window. But when one leg is a commodity (crude oil, gold) or a single high-beta stock (e.g. Nvidia), the two-week realized spread regularly reaches ±10pp or more — crude-vs-equity spreads have hit ±18pp. In those cases set p10/p90 to at least ±10pp (±15pp or wider for oil) while keeping the median near the status-quo spread; the 2-3pp intuition applies only to index-vs-index.
- **Heavy-tailed one-off magnitudes (opening-weekend box office, product-launch or debut numbers).** Pre-event tracking for these routinely misses by ±40% or more, and results land both far above and far below the consensus. Do NOT treat the displayed [min, max] range as the plausible range or clamp p10/p90 to its edges: the outcome can fall outside the range in either direction (recent opening weekends resolved ~7% above a displayed ceiling in one case and roughly half the displayed floor in another). Set p10/p90 wide enough that a 2x-or-0.5x surprise versus your central estimate still lands inside the interval, and when concrete current tracking disagrees with historical/franchise base rates, weight the tracking.
## Output
Return ONLY valid JSON, no markdown fences:
{
"rationale": "<address (a) through (f) above, then state your distribution — 6-10 sentences total>",
"p10": <number>,
"p25": <number>,
"p50": <number>,
"p75": <number>,
"p90": <number>
}
Percentiles MUST be in non-decreasing order (p10 <= p25 <= p50 <= p75 <= p90).
{
"forecast": {
"evidence_brief": "1. [sq1 | web_search | MODERATE cred 60 | UP | DATED] Robo Tracker\u0027s leaderboard is an actively maintained site with documented FAQ methodology (census-tract intersection) and was updated in early 2026 to focus on active services.\n2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | RECENT] Crawled robotracker.app/leaderboard pages returned only placeholder fields (\u0027mi\u00b2 population\u0027), so no current numeric Waymo population-served figure was retrieved.\n3. [sq2 | web_search | STRONG cred 70 | NEUTRAL | DATED] Robo Tracker counts only services fully open to the public with no waitlist, no safety monitor, and adequate fleet size, excluding pilot/waitlist launches.\n4. [sq2 | article_search | STRONG cred 92 | UP | DATED] Waymo raised a $16 billion round in February 2026 at a $126 billion valuation, explicitly to fund continued market expansion.\n5. [sq2 | web_search | STRONG cred 85 | UP | RECENT] Waymo reported over 20 million lifetime trips and ~3,000 robotaxis by May 2026, targeting 1 million paid rides per week by end of 2026.\n6. [sq2 | article_search | MODERATE cred 88 | UP | DATED] Waymo began deploying its sixth-generation \u0027Ojai\u0027 driverless platform in February 2026, described by the company as the primary engine for its next expansion era.\n7. [sq3 | web_search | STRONG cred 88 | UP | DATED] Waymo operated in 10 U.S. metro areas by February 2026, having added Dallas, Houston, San Antonio, Orlando and Miami to its five original markets.\n8. [sq3 | article_search | MODERATE cred 85 | DOWN | DATED] In February 2026 Waymo announced it was only \u0027laying the groundwork\u0027 in Boston and Sacramento, with no service start date given.\n9. [sq3 | article_search | MODERATE cred 82 | DOWN | DATED] Waymo\u0027s Toronto effort as of April 2026 was at the testing/permission stage, facing regulatory and winter-weather obstacles.\n10. [sq3 | article_search | WEAK cred 40 | NEUTRAL | VERY_RECENT] No articles between February and July 2026 in the retrieved set announced a new fully public Waymo metro launch after the early-2026 batch.\n11. [sq4 | article_search | MODERATE cred 90 | UP | VERY_RECENT] IIHS study (July 2026) found Waymo vehicles in 68% fewer police-reported crashes than human drivers, reducing likely regulatory friction to expansion.\n12. [sq4 | code_execution | WEAK cred 30 | NEUTRAL | VERY_RECENT] Monte Carlo of an 8-month lognormal growth multiple yields median ~38M population served, 5-95% range ~18M-80M, with P(\u003e1.5x)=0.70 and P(\u003e3x)=0.15.\n\n## Cross-Market Signals\n\n### Polymarket\n- \"Will there be no change in Fed interest rates after the September 2026 meeting?\" \u2192 Yes: 0.45, Volume: $2.8M\n- \"Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.03, Volume: $2.5M\n- \"Will the Fed increase interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.53, Volume: $1.9M\n- \"Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.01, Volume: $1.0M\n- \"Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.02, Volume: $886.7K\n- \"Will Russia capture Havrylivka by September 30, 2026?\" \u2192 Yes: 0.05, Volume: $101.0K\n- \"Will Russia capture Mala Tokmachka by September 30, 2026?\" \u2192 Yes: 0.09, Volume: $255.2K\n\nInformation gaps:\n - No actual Robo Tracker Waymo population-served number for early 2026 or mid-2026 (the required base value)\n - No historical time series of Robo Tracker population figures to estimate monthly growth rate\n - No confirmation of which 2026 metros meet Robo Tracker\u0027s no-waitlist/no-monitor criteria\n - No data on freeway/airport/whole-metro service-area expansions in 2026\n\nKey uncertainties:\n - Whether tracker counts only qualifying fully-public metros vs. all service areas\n - Timing of Boston, Sacramento, Detroit, Nashville, DC-type launches before Sept 1\n - Size of service polygons in new Sun Belt metros (large area vs. dense population)\n - Possible methodology change or site downtime at Robo Tracker",
"forecast_prompt": "You are an elite superforecaster. Produce a probability distribution over the answer to this Metaculus numeric question.\n\n## Question\nWhat will be Waymo\u0027s population served on September 1, 2026?\n\n## Description / Resolution Criteria\n## Description\nGizmodo: [Waymo\u2019s Coverage Area Is Growing and Will Soon Be Larger Than Rhode Island](https://gizmodo.com/waymos-coverage-area-is-growing-and-will-soon-be-larger-than-rhode-island-2000758726)\n\n`{\"format\": \"bot_tournament_question\", \"info\": {\"hash_id\": \"d6d855137ea867e8\", \"sheet_id\": \"125\"}}`\n\n## Resolution Criteria\nThis question resolves as the total population served of Waymo on September 1, 2026, according to the Robo Tracker [Robotaxi Leaderboard](https://robotracker.app/leaderboard).\n\n## Fine Print\nNo other resolution source will be used, and this question will resolve exactly as the number displayed by the resolution source.\n\n## Range\nThe answer must be a number in [7000000, 10000000] (units: people).\n\n## Sub-question decomposition (planner)\n- (w=0.15) Will the Robo Tracker Robotaxi Leaderboard still be operational and display a Waymo \u0027population served\u0027 figure on September 1, 2026? \u2014 Resolution depends entirely on a single third-party tracker; a definition change, methodology revision, or site shutdown\n- (w=0.30) Will Waymo\u0027s population served on the Robo Tracker leaderboard on Sept 1, 2026 be at least 1.5x its value as of early 2026? \u2014 Captures the base-case continuation of Waymo\u0027s rapid geographic expansion (new metros: Dallas, Denver, Nashville, Miami,\n- (w=0.30) Will Waymo have launched public (non-waitlist) rider service in at least 5 additional new metropolitan markets between January 2026 and September 1, 2026? \u2014 New metro launches are the primary step-function driver of population-served; each large metro can add millions to the c\n- (w=0.25) Will Waymo\u0027s population served on Sept 1, 2026 exceed 3x its early-2026 value (i.e., an explosive expansion scenario including freeway/airport/whole-metro coverage expansions)? \u2014 Defines the upper tail; whether Waymo expands service polygons to entire metro regions rather than incremental suburbs d\n\n## Synthesized evidence\n1. [sq1 | web_search | MODERATE cred 60 | UP | DATED] Robo Tracker\u0027s leaderboard is an actively maintained site with documented FAQ methodology (census-tract intersection) and was updated in early 2026 to focus on active services.\n2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | RECENT] Crawled robotracker.app/leaderboard pages returned only placeholder fields (\u0027mi\u00b2 population\u0027), so no current numeric Waymo population-served figure was retrieved.\n3. [sq2 | web_search | STRONG cred 70 | NEUTRAL | DATED] Robo Tracker counts only services fully open to the public with no waitlist, no safety monitor, and adequate fleet size, excluding pilot/waitlist launches.\n4. [sq2 | article_search | STRONG cred 92 | UP | DATED] Waymo raised a $16 billion round in February 2026 at a $126 billion valuation, explicitly to fund continued market expansion.\n5. [sq2 | web_search | STRONG cred 85 | UP | RECENT] Waymo reported over 20 million lifetime trips and ~3,000 robotaxis by May 2026, targeting 1 million paid rides per week by end of 2026.\n6. [sq2 | article_search | MODERATE cred 88 | UP | DATED] Waymo began deploying its sixth-generation \u0027Ojai\u0027 driverless platform in February 2026, described by the company as the primary engine for its next expansion era.\n7. [sq3 | web_search | STRONG cred 88 | UP | DATED] Waymo operated in 10 U.S. metro areas by February 2026, having added Dallas, Houston, San Antonio, Orlando and Miami to its five original markets.\n8. [sq3 | article_search | MODERATE cred 85 | DOWN | DATED] In February 2026 Waymo announced it was only \u0027laying the groundwork\u0027 in Boston and Sacramento, with no service start date given.\n9. [sq3 | article_search | MODERATE cred 82 | DOWN | DATED] Waymo\u0027s Toronto effort as of April 2026 was at the testing/permission stage, facing regulatory and winter-weather obstacles.\n10. [sq3 | article_search | WEAK cred 40 | NEUTRAL | VERY_RECENT] No articles between February and July 2026 in the retrieved set announced a new fully public Waymo metro launch after the early-2026 batch.\n11. [sq4 | article_search | MODERATE cred 90 | UP | VERY_RECENT] IIHS study (July 2026) found Waymo vehicles in 68% fewer police-reported crashes than human drivers, reducing likely regulatory friction to expansion.\n12. [sq4 | code_execution | WEAK cred 30 | NEUTRAL | VERY_RECENT] Monte Carlo of an 8-month lognormal growth multiple yields median ~38M population served, 5-95% range ~18M-80M, with P(\u003e1.5x)=0.70 and P(\u003e3x)=0.15.\n\n## Cross-Market Signals\n\n### Polymarket\n- \"Will there be no change in Fed interest rates after the September 2026 meeting?\" \u2192 Yes: 0.45, Volume: $2.8M\n- \"Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.03, Volume: $2.5M\n- \"Will the Fed increase interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.53, Volume: $1.9M\n- \"Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.01, Volume: $1.0M\n- \"Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.02, Volume: $886.7K\n- \"Will Russia capture Havrylivka by September 30, 2026?\" \u2192 Yes: 0.05, Volume: $101.0K\n- \"Will Russia capture Mala Tokmachka by September 30, 2026?\" \u2192 Yes: 0.09, Volume: $255.2K\n\nInformation gaps:\n - No actual Robo Tracker Waymo population-served number for early 2026 or mid-2026 (the required base value)\n - No historical time series of Robo Tracker population figures to estimate monthly growth rate\n - No confirmation of which 2026 metros meet Robo Tracker\u0027s no-waitlist/no-monitor criteria\n - No data on freeway/airport/whole-metro service-area expansions in 2026\n\nKey uncertainties:\n - Whether tracker counts only qualifying fully-public metros vs. all service areas\n - Timing of Boston, Sacramento, Detroit, Nashville, DC-type launches before Sept 1\n - Size of service polygons in new Sun Belt metros (large area vs. dense population)\n - Possible methodology change or site downtime at Robo Tracker\n\n## Required pre-forecast walkthrough\n\nBefore giving percentiles, address these explicitly in your rationale:\n (a) The time left until the question resolves.\n (b) The outcome if NOTHING changes from today (the status quo value).\n (c) The outcome if the CURRENT TREND continues.\n (d) The expectations of experts / markets / base rates.\n (e) A plausible scenario that produces a LOW outcome (near p10).\n (f) A plausible scenario that produces a HIGH outcome (near p90).\n\n## Calibration guidance\n\n- **Be humble about tails.** Good forecasters set WIDE 90/10 intervals to account for unknown unknowns. Narrow tails get punished by the log score far more than slightly-biased medians.\n- **Status quo anchoring.** The p50 should be close to the status quo value unless you have strong evidence of a trend.\n- Don\u0027t pile mass at one value \u2014 if you\u0027re tempted, widen the spread by 20-50%.\n- **Anchor on markets/experts.** If liquid market prices, analyst forecasts, or community percentiles appear in the evidence, center your distribution on them and widen \u2014 don\u0027t override a liquid market without specific evidence it lacks.\n- **Relative-return / spread questions (\"how much will X\u0027s return exceed Y\u0027s\").** A near-zero median is usually right, but size the TAILS to the more VOLATILE leg, not to a generic 2-3pp spread. Two broad equity indices (e.g. Nasdaq-100 vs S\u0026P 500) do stay within roughly \u00b12-3pp over a two-week window. But when one leg is a commodity (crude oil, gold) or a single high-beta stock (e.g. Nvidia), the two-week realized spread regularly reaches \u00b110pp or more \u2014 crude-vs-equity spreads have hit \u00b118pp. In those cases set p10/p90 to at least \u00b110pp (\u00b115pp or wider for oil) while keeping the median near the status-quo spread; the 2-3pp intuition applies only to index-vs-index.\n- **Heavy-tailed one-off magnitudes (opening-weekend box office, product-launch or debut numbers).** Pre-event tracking for these routinely misses by \u00b140% or more, and results land both far above and far below the consensus. Do NOT treat the displayed [min, max] range as the plausible range or clamp p10/p90 to its edges: the outcome can fall outside the range in either direction (recent opening weekends resolved ~7% above a displayed ceiling in one case and roughly half the displayed floor in another). Set p10/p90 wide enough that a 2x-or-0.5x surprise versus your central estimate still lands inside the interval, and when concrete current tracking disagrees with historical/franchise base rates, weight the tracking.\n\n## Output\n\nReturn ONLY valid JSON, no markdown fences:\n\n{\n \"rationale\": \"\u003caddress (a) through (f) above, then state your distribution \u2014 6-10 sentences total\u003e\",\n \"p10\": \u003cnumber\u003e,\n \"p25\": \u003cnumber\u003e,\n \"p50\": \u003cnumber\u003e,\n \"p75\": \u003cnumber\u003e,\n \"p90\": \u003cnumber\u003e\n}\n\nPercentiles MUST be in non-decreasing order (p10 \u003c= p25 \u003c= p50 \u003c= p75 \u003c= p90).\n",
"models": [
"opus",
"secondary"
],
"p50": 8675000.0,
"percentiles": {
"0.1": 7300000.0,
"0.25": 7950000.0,
"0.5": 8675000.0,
"0.75": 9300000.0,
"0.9": 9775000.0
},
"rationale": "(a) Resolution is Sept 1, 2026, roughly one to two months from the latest evidence (July 2026 items), so this is a short-horizon question dominated by the status quo. (b) If nothing changes, the tracker\u0027s Waymo \u0027population served\u0027 figure stays wherever it is now; the question\u0027s [7M, 10M] band strongly implies the current figure sits inside that band, likely in the lower-middle (~7.5\u20138.5M) given the question was framed to allow for growth. (c) Robo Tracker counts only fully public, no-waitlist, no-safety-monitor services, so growth comes in step functions from qualifying metro launches and service-polygon expansions; continuing the 2026 trend (10 metros by Feb 2026, sixth-gen platform rollout, $16B raise, freeway/airport additions) implies modest incremental growth of maybe 5\u201320% over a couple of months, i.e. mid-8Ms to low 9Ms. (d) No market or expert numbers exist for this specific metric; the only quantitative aid (a Monte Carlo over an 8-month multiple) is inconsistent with the question\u0027s bounds and I discount it in favor of anchoring on the given range and the short horizon. (e) A low outcome (~7.2\u20137.5M) arises if the current value is at the bottom of the band, no new market graduates to \u0027fully public\u0027 status before September (Boston/Sacramento/Toronto all still pre-launch per evidence), or the tracker tightens methodology/reclassifies a market, shrinking the figure. (f) A high outcome (~9.7\u201310M+) arises if one or two large metros (e.g. Miami, Detroit, Nashville, Washington DC, San Diego) flip to fully public with wide polygons, or Waymo blankets an existing metro like LA/Dallas/Houston, each of which can add 1\u20132M people at once. Because I lack the actual baseline number, my distribution is deliberately broad and covers most of the allowed range, with a slight tilt above the midpoint to reflect expansion momentum and the fact that this metric is monotonically increasing in practice."
},
"plan": {
"combination_logic": "weighted_average",
"domain": "tech",
"n_sub_qs": 4,
"n_tools": 4,
"reasoning_approach": "Establish the current Robo Tracker population-served value and its recent growth rate, then use the weighted sub-question probabilities (tracker continuity, moderate growth, new-metro launches, explosive-growth tail) to shape a lognormal growth-multiple distribution applied to the current base, yielding percentiles for the numeric forecast.",
"sub_questions": [
{
"id": "sq1",
"question": "Will the Robo Tracker Robotaxi Leaderboard still be operational and display a Waymo \u0027population served\u0027 figure on September 1, 2026?",
"rationale": "Resolution depends entirely on a single third-party tracker; a definition change, methodology revision, or site shutdown is the main non-growth risk driving the distribution.",
"weight": 0.15
},
{
"id": "sq2",
"question": "Will Waymo\u0027s population served on the Robo Tracker leaderboard on Sept 1, 2026 be at least 1.5x its value as of early 2026?",
"rationale": "Captures the base-case continuation of Waymo\u0027s rapid geographic expansion (new metros: Dallas, Denver, Nashville, Miami, DC, Detroit, Las Vegas, San Diego, etc.) over ~8 months.",
"weight": 0.3
},
{
"id": "sq3",
"question": "Will Waymo have launched public (non-waitlist) rider service in at least 5 additional new metropolitan markets between January 2026 and September 1, 2026?",
"rationale": "New metro launches are the primary step-function driver of population-served; each large metro can add millions to the covered population.",
"weight": 0.3
},
{
"id": "sq4",
"question": "Will Waymo\u0027s population served on Sept 1, 2026 exceed 3x its early-2026 value (i.e., an explosive expansion scenario including freeway/airport/whole-metro coverage expansions)?",
"rationale": "Defines the upper tail; whether Waymo expands service polygons to entire metro regions rather than incremental suburbs determines whether the figure roughly doubles or multiplies several-fold.",
"weight": 0.25
}
],
"tool_requests": [
{
"parameters": {
"queries": [
"robotracker.app leaderboard Waymo population served",
"Waymo population served millions service area 2026",
"robotracker robotaxi leaderboard Waymo coverage area square miles"
]
},
"target_sub_questions": [
"sq1",
"sq2",
"sq4"
],
"tool_name": "web_search"
},
{
"parameters": {
"brief": "Find the current Waymo \u0027population served\u0027 number on robotracker.app\u0027s Robotaxi Leaderboard, plus its historical trajectory over the past 6-12 months (any archived or reported values). Also compile Waymo\u0027s announced and rumored city launches and service-area expansions planned for 2026 (Dallas, Denver, Nashville, Miami, Washington DC, Detroit, Las Vegas, San Diego, Houston, San Antonio, Orlando, Minneapolis, Tampa, New Orleans, international), plus freeway and airport access expansions, and any Waymo statements about total population covered.",
"max_searches": 5,
"question_title": "What will be Waymo\u0027s population served on September 1, 2026?"
},
"target_sub_questions": [
"sq1",
"sq2",
"sq3",
"sq4"
],
"tool_name": "claude_news"
},
{
"parameters": {
"lookback_days": 180,
"queries": [
"Waymo expands service area new city launch",
"Waymo coverage area square miles population served",
"Waymo 2026 city expansion plans robotaxi"
]
},
"target_sub_questions": [
"sq2",
"sq3"
],
"tool_name": "article_search"
},
{
"parameters": {
"code": "import numpy as np\n# Monte Carlo: population served growth from a base value over ~8 months\n# base assumed from research; model log-normal growth multiple\nnp.random.seed(0)\nbase = 20e6 # placeholder, replace with researched current value\nmult = np.exp(np.random.normal(np.log(1.9), 0.45, 200000)) # 8-month growth multiple\nvals = base*mult\nfor q in [5,10,25,50,75,90,95]:\n print(q, round(np.percentile(vals,q)/1e6,2), \u0027M\u0027)\nprint(\u0027P(\u003e1.5x)\u0027, (mult\u003e1.5).mean(), \u0027P(\u003e3x)\u0027, (mult\u003e3).mean())",
"description": "Monte Carlo simulation of Waymo population-served growth multiple over 8 months to produce a percentile distribution for the numeric answer."
},
"target_sub_questions": [
"sq2",
"sq4"
],
"tool_name": "code_execution"
}
]
},
"question": {
"close_time": "2026-07-31T09:00:00Z",
"description": "## Description\nGizmodo: [Waymo\u2019s Coverage Area Is Growing and Will Soon Be Larger Than Rhode Island](https://gizmodo.com/waymos-coverage-area-is-growing-and-will-soon-be-larger-than-rhode-island-2000758726)\n\n`{\"format\": \"bot_tournament_question\", \"info\": {\"hash_id\": \"d6d855137ea867e8\", \"sheet_id\": \"125\"}}`\n\n## Resolution Criteria\nThis question resolves as the total population served of Waymo on September 1, 2026, according to the Robo Tracker [Robotaxi Leaderboard](https://robotracker.app/leaderboard).\n\n## Fine Print\nNo other resolution source will be used, and this question will resolve exactly as the number displayed by the resolution source.",
"open_lower": true,
"open_upper": true,
"q_max": 10000000,
"q_min": 7000000,
"question_type": "numeric",
"title": "What will be Waymo\u0027s population served on September 1, 2026?",
"units": "people"
},
"research": {
"cross_market_brief": "## Cross-Market Signals\n\n### Polymarket\n- \"Will there be no change in Fed interest rates after the September 2026 meeting?\" \u2192 Yes: 0.45, Volume: $2.8M\n- \"Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.03, Volume: $2.5M\n- \"Will the Fed increase interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.53, Volume: $1.9M\n- \"Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.01, Volume: $1.0M\n- \"Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.02, Volume: $886.7K\n- \"Will Russia capture Havrylivka by September 30, 2026?\" \u2192 Yes: 0.05, Volume: $101.0K\n- \"Will Russia capture Mala Tokmachka by September 30, 2026?\" \u2192 Yes: 0.09, Volume: $255.2K",
"errors": [],
"has_cross_market": true,
"n_errors": 0,
"n_tools": 4,
"tools": [
{
"elapsed_s": 33.9,
"error": null,
"success": true,
"summary": "0 results",
"tool_name": "web_search"
},
{
"elapsed_s": 32.98,
"error": null,
"success": true,
"summary": "18 citations",
"tool_name": "claude_news"
},
{
"elapsed_s": 0.67,
"error": null,
"success": true,
"summary": "19 articles",
"tool_name": "article_search"
},
{
"elapsed_s": 0.2,
"error": null,
"success": true,
"summary": "Monte Carlo simulation of Waymo population-served growth mul",
"tool_name": "code_execution"
}
]
},
"synthesis": {
"evidence": [
{
"claim": "Robo Tracker\u0027s leaderboard is an actively maintained site with documented FAQ methodology (census-tract intersection) and was updated in early 2026 to focus on active services.",
"credibility": 60,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "MODERATE",
"sub_question_id": "sq1"
},
{
"claim": "Crawled robotracker.app/leaderboard pages returned only placeholder fields (\u0027mi\u00b2 population\u0027), so no current numeric Waymo population-served figure was retrieved.",
"credibility": 45,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "RECENT",
"source": "web_search",
"strength": "WEAK",
"sub_question_id": "sq1"
},
{
"claim": "Robo Tracker counts only services fully open to the public with no waitlist, no safety monitor, and adequate fleet size, excluding pilot/waitlist launches.",
"credibility": 70,
"direction": "NEUTRAL",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "STRONG",
"sub_question_id": "sq2"
},
{
"claim": "Waymo raised a $16 billion round in February 2026 at a $126 billion valuation, explicitly to fund continued market expansion.",
"credibility": 92,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "article_search",
"strength": "STRONG",
"sub_question_id": "sq2"
},
{
"claim": "Waymo reported over 20 million lifetime trips and ~3,000 robotaxis by May 2026, targeting 1 million paid rides per week by end of 2026.",
"credibility": 85,
"direction": "UP",
"priced_in": true,
"recency": "RECENT",
"source": "web_search",
"strength": "STRONG",
"sub_question_id": "sq2"
},
{
"claim": "Waymo began deploying its sixth-generation \u0027Ojai\u0027 driverless platform in February 2026, described by the company as the primary engine for its next expansion era.",
"credibility": 88,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq2"
},
{
"claim": "Waymo operated in 10 U.S. metro areas by February 2026, having added Dallas, Houston, San Antonio, Orlando and Miami to its five original markets.",
"credibility": 88,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "STRONG",
"sub_question_id": "sq3"
},
{
"claim": "In February 2026 Waymo announced it was only \u0027laying the groundwork\u0027 in Boston and Sacramento, with no service start date given.",
"credibility": 85,
"direction": "DOWN",
"priced_in": true,
"recency": "DATED",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq3"
},
{
"claim": "Waymo\u0027s Toronto effort as of April 2026 was at the testing/permission stage, facing regulatory and winter-weather obstacles.",
"credibility": 82,
"direction": "DOWN",
"priced_in": true,
"recency": "DATED",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq3"
},
{
"claim": "No articles between February and July 2026 in the retrieved set announced a new fully public Waymo metro launch after the early-2026 batch.",
"credibility": 40,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "article_search",
"strength": "WEAK",
"sub_question_id": "sq3"
},
{
"claim": "IIHS study (July 2026) found Waymo vehicles in 68% fewer police-reported crashes than human drivers, reducing likely regulatory friction to expansion.",
"credibility": 90,
"direction": "UP",
"priced_in": true,
"recency": "VERY_RECENT",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq4"
},
{
"claim": "Monte Carlo of an 8-month lognormal growth multiple yields median ~38M population served, 5-95% range ~18M-80M, with P(\u003e1.5x)=0.70 and P(\u003e3x)=0.15.",
"credibility": 30,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "code_execution",
"strength": "WEAK",
"sub_question_id": "sq4"
}
],
"information_gaps": [
"No actual Robo Tracker Waymo population-served number for early 2026 or mid-2026 (the required base value)",
"No historical time series of Robo Tracker population figures to estimate monthly growth rate",
"No confirmation of which 2026 metros meet Robo Tracker\u0027s no-waitlist/no-monitor criteria",
"No data on freeway/airport/whole-metro service-area expansions in 2026"
],
"key_uncertainties": [
"Whether tracker counts only qualifying fully-public metros vs. all service areas",
"Timing of Boston, Sacramento, Detroit, Nashville, DC-type launches before Sept 1",
"Size of service polygons in new Sun Belt metros (large area vs. dense population)",
"Possible methodology change or site downtime at Robo Tracker"
],
"n_evidence": 12
},
"timings": {
"forecast": 70.88,
"plan": 22.86,
"research": 33.9,
"synthesis": 28.06
}
}