| Title | Safety Evaluation of Protected Left-Turn Phasing and Leading Pedestrian Intervals on Pedestrian Safety |
|---|---|
| Record ID | 65553 |
| Personal Name Creator |
Goughnour, Elissa; Carter, Daniel L.; Lyon, Craig; Persaud, Bhagwant; Lan, Bo; Chun, Piljin; Hamilton, Ian; Signor, Kari |
| Personal Name Contributor |
Do, Ann |
| Corporate Creator | VHB/Vanasse Hangen Brustlin, Inc. |
| Corporate Contributor |
United States. Federal Highway Administration |
| Publisher | United States. Federal Highway Administration |
| Publication Date | 20181001 |
| Language | English |
| Abstract | The objective of the study was to evaluate the safety effects of two countermeasures with respect to vehicle–pedestrian crashes—the provision of protected or protected/permissive left-turn phasing and the provision of leading pedestrian intervals (LPIs)—using a before–after empirical Bayesian methodology. The study used data from North American cities that had installed one or both of the countermeasures of interest, including Chicago, IL; New York City, NY; Charlotte, NC; and Toronto, ON. This study showed that the provision of protected left-turn phasing reduced vehicle–vehicle injury crashes but did not produce statistically significant results for vehicle–pedestrian crashes overall. A disaggregate analysis of the effect of protected or protected/permissive left-turn phasing on vehicle–pedestrian crashes indicated that this strategy may be more beneficial when there are higher pedestrian and vehicle volumes, particularly above 5,500 pedestrians per day. At these high-volume locations, the left-turn phasing evaluation resulted in a potential benefit–cost (B/C) ratio range of 1:15.6::1:38.9. The evaluation of LPIs showed that the countermeasure reduced vehicle–pedestrian crashes. This evaluation produced a crash modification factor of 0.87 with a potential B/C ratio range of 1:207::1:517. |
| Rosap ID | dot:37580 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/37580 |
| TRT Terms | Pedestrian safety; Left turn phase; Traffic signal intervals |
| Geographical Coverage |
United States |
| OCLC | 1076363298 |
| Contract Number | DTFH61-13-D-00001 |
| Report Number | FHWA-HRT-18-044; HRDS-30/10-18(WEB)E |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/65000/65500/65553/FHWA-HRT-18-044.pdf |
| Format | |
| Database | NTL Digital Repository |