01476977

Component

Sharrows are intended to encourage shared use of a facility for both bicycles and motor vehicles, as well as indentify the appropriate placement for bicyclists within the roadway. This paper analyzes the influence of several site characteristics on the operational and safety effects on bicyclists and motorists at two curbed roadway segments in Florida. Three main site variables were studied: lateral separation between vehicles and bicyclists, vehicle encroachments to the adjacent inside lane, and distance from face of curb that bicyclists track. Results suggest that installation of sharrows can increase the lateral vehicle clearance significantly. It was also observed that less restrictive lane changing conditions greatly increase the lateral separation between vehicles and bicyclists. Also, the percentage of vehicles that passed along side bicyclists with little to no encroachment was notably reduced after sharrows were placed, suggesting positive safety effects for bicyclists. Overall, operational effects for bicyclists and motor vehicles were positive with the implementation of sharrows.

This paper was sponsored by TRB committee ANF20 Bicycle Transportation.

01470560

13-2507

English

14p

2013

Transportation Research Board 92nd Annual Meeting

Digital/other

Figures; References; Tables

Before and after studies; Lane lines; Multiple regression analysis; Traffic conflicts; Vehicle mix

Bicycle safety; Sharrows

Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I82: Accidents and Transport Infrastructure

Transportation Research Board Annual Meeting 2013 Paper #13-2507

TRIS, TRB, ATRI

Feb 5 2013 12:32PM