State Departments of Transportation and other transportation agencies lack proper guidelines to effectively apply different median treatments. Often, only one factor might be taken into consideration in the decision-making procedure at the expense of other influential factors, chiefly because of the lack of information regarding other related factors. The factors that influence the safety of two-way left-turn lanes (TWLTL) need to be identified. The purpose of the research was to develop a tool for identifying TWLTL locations that present safety concerns and that might need improvement based on factors that are influential in the safety experience of TWLTL sections. Specific objectives included the following: to obtain information for traffic volume, driveway density, posted speed, number of lanes, and other relevant information for select TWLTL sections; to determine driveway density from video logs and verify that all locations considered were TWLTL; to conduct detailed crash data analysis to establish factors influencing crashes and best-fitted distribution; and to develop statistical models for crash expectancy as a function of roadway traffic volume, driveway density, and posted speed at TWLTL.
Safety Issues Related to Two-Way Left-Turn Lanes
2004
142 pages
Report
Keine Angabe
Englisch
Safety Evaluation of Offset Improvements for Left-Turn Lanes
Online Contents | 2010
|Safety Evaluation of Offset Improvements for Left-Turn Lanes
Transportation Research Record | 2010
|Safety Effectiveness of Intersection Left- and Right-Turn Lanes
Online Contents | 2003
|Safety Effectiveness of Intersection Left- and Right-Turn Lanes
Transportation Research Record | 2003
|