01698196

Component

The Brooklyn Bridge Promenade is a typical non-motorized shared space with a centerline marking to separate pedestrians and cyclists. Violations that involve pedestrians and cyclists crossing the centerline to an undesignated path may lead to unexpected interactions and even collisions. This study aims at modelling violations of pedestrians and cyclists at an aggregate level and investigating the contributing factors to the violation frequency. Specifically, violation counts of 5-minute intervals are predicted as a function of traffic flow and other geometry-related variables, using the univariate Poisson log-normal model. In order to account for possible temporal correlation in the time series counts as well as the mode correlation between the two types of violations, fixed-over-time-effects models and multivariate models are further developed. A mixed procedure is introduced to the multivariate model to allow different covariate sets for pedestrian and bicycle violations. The model comparison results show that introducing the fixed-over-time-effects makes no substantial difference from the standard models, while the multivariate models outperform the univariate models. Results also show that variables such as pedestrian/cyclist count, width of path, length of path have significant influence on at least one type of violations (pedestrian or bicycle violation), while the influence of directional distribution and speed-related variables are insignificant. An interesting finding is that, some common variables such as cyclist count and the width of cyclist path, have significantly opposite effects on violations of pedestrians and cyclists.

This paper was sponsored by TRB committee ANF10 Standing Committee on Pedestrians.

19-00432

English

5p

2019

Transportation Research Board 98th Annual Meeting

Digital/other

References

Cyclists; Footbridges; Highway bridges; Moving violations; Pedestrians

Brooklyn Bridge (New York)

Bridges and other structures; Highways; Pedestrians and Bicyclists; Safety and Human Factors

Transportation Research Board Annual Meeting 2019 Paper #19-00432

TRIS, TRB, ATRI

Dec 7 2018 9:48AM