01026061

Component

https://doi.org/10.3141/1961-07

http://scholar.google.com...Park&publication_year=2006

The objectives of this research by the Texas Department of Transportation were to determine the variables that affect the speeds of free-flow turning vehicles in an exclusive right-turn lane and explore the safety experience of different right-turn lane designs. The evaluations found that the variables affecting the turning speed at an exclusive right-turn lane include type of channelization present (either lane line or raised island), lane length, and corner radius. Variables that affect the turning speed at an exclusive right-turn lane with island design include (a) radius, lane length, and island size at the beginning of the turn and (b) corner radius, lane length, and turning-roadway width near the middle of the turn. Researchers for a Georgia study concluded that treatments that had the highest number of crashes were right-turn lanes with raised islands. This type of intersection had the second highest number of crashes of the treatments evaluated in Texas. In both studies, the “shared through with right lane combination” had the lowest number of crashes. These findings need to be verified through use of a larger, more comprehensive study that includes right-turning volume.

01033942

English

pp 55-64

2006

Transportation Research Record: Journal of the Transportation Research Board

0309099706

Print

Figures (4) ; References (5) ; Tables (6)

Highway design; Intersections; Right turn lanes; Traffic channelization; Traffic islands; Traffic speed; Turning lanes; Turning radius; Turning traffic

Texas Department of Transportation

Georgia; Texas

Design; Highways; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure; I82: Accidents and Transport Infrastructure

TRIS, TRB, ATRI

Mar 3 2006 10:17AM

• Alternating Passing Lane Lengths
• Daytime High-Speed Passing Maneuvers Observed on Rural Two-Lane, Two-Way Highway: Findings and Implications
• Design of Safe Urban Roadsides: An Empirical Analysis
• Desirable Length of Spiral Curves for Two-Lane Rural Roads
• Hierarchical Fuzzy Inference System to Evaluate Expert Opinions on Median Safety
• Operating-Speed Model for Low-Speed Urban Tangent Streets Based on In-Vehicle Global Positioning System Data
• Radius Requirements for Trucks on Three-Dimensional Reverse Horizontal Curves with Intermediate Tangents
• Role and Application of Accident Modification Factors Within Highway Design Process
• Three-Dimensional Stop-Control Intersection Sight Distance: General Model
• Upstream Signalized Crossover Intersection: Optimization and Performance Issues