Guidance to Improve Pedestrian and Bicyclist Safety at Intersections

Investigation of the Effects of Leading Pedestrian Intervals and Protected Vehicular Left-turn Phasing on Pedestrian Safety

“…There are various countermeasures road safety engineers recommend to reduce vehiclepedestrian collisions at signalized intersections. A recent report from the National Cooperative Highway Research Program (NCHRP) collected information from traffic engineering professionals and safety studies to suggest countermeasures suitable for improving pedestrian and bicycle safety (Sanders et al, 2020). Examples of these were leading pedestrian intervals (LPIs) and fully protected vehicular left-turns (FPLT).…”

“…Various transportation professionals recommend using protected left-turn signal phasing to improve pedestrian safety and left-turning collisions at intersections because of the limited geometry change and cost required to implement this signal phasing (Sanders et al, 2020). Changes from permissive-protected to protected left-turn phasing resulted in CMFs from 0.0 to 0.01 (Srinivasan et al, 2008) when looking at left-turn collisions between vehicle-vehicle and vehiclepedestrian collisions, while changes from permissive to protected-permissive phasing resulted in CMFs from 0.787 to 1.136 (Srinivasan et al, 2008) (Goughnour et al, 2021).…”

“…Left-turning conflict models were developed by exploring various explanatory variables that are known to affect left-turning conflicts (Sanders et al, 2020). Additionally, different definitions of exposures (pedestrian and vehicle volumes) were explored as these are integral components in developing conflict frequency models.…”

Investigation of the Effects of Leading Pedestrian Intervals and Protected Vehicular Left-turn Phasing on Pedestrian Safety

“…There are various countermeasures road safety engineers recommend to reduce vehiclepedestrian collisions at signalized intersections. A recent report from the National Cooperative Highway Research Program (NCHRP) collected information from traffic engineering professionals and safety studies to suggest countermeasures suitable for improving pedestrian and bicycle safety (Sanders et al, 2020). Examples of these were leading pedestrian intervals (LPIs) and fully protected vehicular left-turns (FPLT).…”

“…Various transportation professionals recommend using protected left-turn signal phasing to improve pedestrian safety and left-turning collisions at intersections because of the limited geometry change and cost required to implement this signal phasing (Sanders et al, 2020). Changes from permissive-protected to protected left-turn phasing resulted in CMFs from 0.0 to 0.01 (Srinivasan et al, 2008) when looking at left-turn collisions between vehicle-vehicle and vehiclepedestrian collisions, while changes from permissive to protected-permissive phasing resulted in CMFs from 0.787 to 1.136 (Srinivasan et al, 2008) (Goughnour et al, 2021).…”