clm-b1bbfb23f9d83056
quantitative
Red Light Violation Warning cut red-light running by 41 percent and Lane Change Warning cut the unsafe lane change rate by 46 percent
Permanent project revision
Revision 2026-08-20-source-dates · effective 2026-08-06
Current revision. This is the snapshot used by the live entity page.
Created the first structured Evidence Passport with 1 claim and 10 source dossiers.
sha256:d34a09ad1ca9edcf33e47e8edcac4e462a55e780a3e50a36079fbb0874839392
add /evidencePassport — Added claim-level evidence mapping and source dossiers.add /revisionHistory — Established a permanent, hash-addressed baseline revision.The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.
clm-b1bbfb23f9d83056
quantitative
Red Light Violation Warning cut red-light running by 41 percent and Lane Change Warning cut the unsafe lane change rate by 46 percent
This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:d34a09ad1ca9edcf33e47e8edcac4e462a55e780a3e50a36079fbb0874839392
src-50aad1abf4cb48c7Federal programme office case study, the deployment-size source. Verbatim: 'In 2016, the United States Department of Transportation (USDOT) awarded the New York City Department of Transportation (NYCDOT) $25 million'; '3,000 city fleet vehicles that frequent the deployment areas were outfitted with onboard CV technology, and 450 CV-enabled roadside units (RSUs) were installed'; 'NYCDOT had to undergo an 18-month process to obtain licenses for all 450 units from the Federal Communication Commission (FCC).'
src-51cc1fd60b8e285dThe evaluation the impact figures come from, and the reason this entry is graded independent: authors Lam, Chupp, Najm, Brewer and Fallings are all Volpe — USDOT's federal research centre — not NYCDOT, the grantee. Assesses nine safety applications over the naturalistic driving of 3,000 equipped vehicles from January to December 2021, across roughly 160,289 alert events.
src-20303aa3d9642bb4Carries the impact sentences verbatim and cites them to the Volpe-sourced benefit record 2022-B01691. Also the source for the 12 MTA buses, the roughly 25 personal devices for visually impaired pedestrians, and the three deployment zones in Manhattan and Brooklyn.
src-14de2d12c2b9e3e0Resolves the attribution chain: the record the 41 and 46 percent figures hang on is sourced to the Volpe report FHWA-JPO-22-937, prepared for the Federal Highway Administration.
src-0fba71b012e81907The counterweight, and independent of both NYCDOT and Volpe. On the New York site: 'there is little evidence to support that the deployment had a significant impact on public agency efficiency', attributed to the safety focus and to COVID-19 having altered NYC travel patterns.
src-a000d0a946d9d1acGrantee's own final performance report — the source for the experimental design quoted in the snippet: a before period from 1 January to 19 May 2021 with every vehicle silent, and an after period from 1 June to 31 December 2021 in which treatment vehicles issued alerts while control vehicles stayed silent.
src-cb5aa2321b096c7aThe load-bearing source for what became of the deployment. Logs NYC DOT's filing of 1 July 2022 seeking to 'deploy C-V2X roadside units to replace the existing but now dormant DSRC' units licensed under call sign WQBH353. The word dormant is the city's own, in a federal filing.
src-fefac6d56526bcfbRegulator's own page on the band change that stranded the deployment: the November 2020 First Report and Order moved the lower 45 megahertz to unlicensed use and kept only the upper 30 megahertz for intelligent transportation systems.
src-acc59d4fddcbdb06Currency check and the operator's closing statement: 'The NYC Connected Vehicle Project has concluded.' The project's dedicated site cvp.nyc now redirects here.
src-d1119f04fd2e67e9Why no pedestrian figure appears in the impact field. The 83 percent who felt safer come from the grantee's own report and a study of 24 volunteers with vision disabilities at four intersections — self-reported. The same record notes participants reporting inaccurate location information and slow responses.