United States Department of Transportation
i
Safety Impact Assessment of New York City Connected Vehicle Pilot Safety Applications
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2022-05-01
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[PDF-3.62 MB]
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Abstract:This report presents the methodology and results of the safety impact assessment of five vehicle-to-vehicle (V2V) and four vehicle-toinfrastructure (V2I) safety applications that were deployed in New York City’s Connected Vehicle Pilot site. This assessment was based on the naturalistic driving experience of 3,000 vehicles that were equipped with these applications, spanning from January through December 2021. The V2V applications included forward collision warning, emergency electronic brake light, lane change warning, blind spot warning, and intersection movement assist. Posted speed, curve speed, and speed in work zone compliance and red light violation warning comprised the V2I applications. The deployed vehicles experienced a total of 160,289 alert events from the nine safety applications combined. There were 107,609 (67%) alerts by V2I applications and52,680 (33%) by V2V applications. Of all these events, 65,231 (41%) alerts were silent and 95,058 (59%) alerts were active. The analysis identified and statistically described vehicle/driver response measures after alert onset for each application, including statistical tests to reveal any statistically-significant differences in any of these measures between silent and active alerts. Response to active alerts showed a decrease in speed non-compliance, red light violation rate, rear-end near-crash rate, lane change rate, and unsafe lane change rate.
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