GUIDELINES FOR RIGHT-TURN TREATMENTS AT UNSIGNALIZED INTERSECTIONS AND DRIVEWAYS
Guidelines for right-turn treatments at unsignalized intersections and driveways on the state highway system of Kansas were developed in this study. Two types of treatments, full-width lane and taper, were considered over the do-nothing radius treatment. THe guidelines were based on the results of an economic analysis conducted over a wide range of traffic volumes and speeds. A simple model was developed to determine the operational effects of right-turn movements at unsignalized intersections and driveways on high-speed highways. The operational effects were estimated in terms of delay and excess fuel consumption experienced by through vehicles due to the right turns. The relationship between speed differential and accidents was used to estimate the reduction in right-turn same direction rear-end accidents that would be expected to result from the provision of a right-turn treatment. Comparison with other guidelines and validation of existing right-turn treatments at the study sites indicate that the range of the guidelines developed in this study isre reasonable. They are also more definitive because they consider highway operating speed. They are more flexible in determining an appropriate treatment because an intermediate taper treatment is considered.
- Record URL:
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Corporate Authors:
Kansas State University, Manhattan
Department of Civil Engineering, Fiedler Hall
Manhattan, KS United States 66506Kansas Department of Transportation
Docking State Office Building
Topeka, KS United States 66612 -
Authors:
- Hasan, T
- Stokes, R W
- Publication Date: 1996-5
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: 100 p.
Subject/Index Terms
- TRT Terms: Driveways; Guidelines; Right turns; Unsignalized intersections
- Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;
Filing Info
- Accession Number: 00732025
- Record Type: Publication
- Report/Paper Numbers: K-TRAN:KSU 95-5
- Files: TRIS, ATRI, STATEDOT
- Created Date: Feb 20 1997 12:00AM