Predicting speeds in an urban right-turn lane Academic Article

abstract

• Right-turn lanes are used to provide space for the deceleration and storage of turning vehicles and to separate the turning vehicles from the through movement. When larger corner radii are used at the right turn, vehicles can turn at higher speeds (thereby minimizing speed differential between turning and through vehicles). A concern with the higher operating speed is the challenge it provides pedestrians. This project analyzed the impact of right-turn treatments on right-turn vehicles speeds at 19 urban approaches. Each approach had an exclusive right-turn lane that was separated from the through lane with either a lane line or a raised corner island. The 85th percentile free-flow speed near the middle of the right turn ranged from 20.9 to 33.8km/h (13-21mi./ h) while on the approach it ranged from 27.4 to 46.7km/h(17-29mi./h). Speed prediction equations were developed as part of this study. 2006 ASCE.

authors

• Park, Eun

published proceedings

• JOURNAL OF TRANSPORTATION ENGINEERING

author list (cited authors)

• Fitzpatrick, K., Schneider, W. H., & Park, E. S.

citation count

• 17

complete list of authors

• Fitzpatrick, K||Schneider, WH||Park, ES

publication date

• March 2006

publisher

• American Society of Civil Engineers (ASCE)  Publisher

published in

• Journal of Transportation Engineering  Journal

keywords

• 35 Commerce, Management, Tourism And Services
• 3509 Transportation, Logistics And Supply Chains
• 40 Engineering
• 4005 Civil Engineering

Digital Object Identifier (DOI)

• 10.1061/(ASCE)0733-947X(2006)132:3(199)

start page

• 199

end page

• 204

volume

• 132

issue

• 3

URL

• http://dx.doi.org/10.1061/(asce)0733-947x(2006)132:3(199)