01370329

Component

https://doi.org/10.3141/2286-02

http://scholar.google.com...Wang&publication_year=2012

Transportation professionals in China have started using left-turn waiting areas and lagging left-turn phasing to improve traffic efficiency at signalized intersections. Left-turn waiting areas are usually set up beyond the stop bar at an exclusive left-turn lane or dual left-turn lanes. This design allows left-turning vehicles to enter and wait at the left-turn waiting area after the initiation of the through phase. The operational impact of left-turn waiting areas at signalized intersections was evaluated, and the arrival and departure processes of left-turning vehicles at exclusive left-turn lanes with and without waiting areas were compared. A procedure for estimating the capacity of an exclusive left-turn lane with a waiting area was proposed. Cross-sectional analysis used data collected from 12 approaches at nine signalized intersections to compare the start-up lost time and saturation headways of left-turn passenger cars for four scenarios. The capacities of exclusive left-turn lanes with differently sized left-turn waiting areas were compared. The results indicate that left-turn waiting areas increase the capacity of exclusive left-turn lanes and that the capacity gains would increase with an increase in the storage capacity of the left-turn waiting area.

01450371

12-2204

English

pp 12–20

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223263

Print

Figures; Photos; References; Tables

Highway capacity; Highway operations; Left turn lanes; Left turn phase; Signalized intersections

China

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2012 5:08PM

• Calibration and Validation of Highway Capacity Manual 2010 Capacity Model for Single-Lane Roundabouts
• Deterministic Approach to Managed Lane Analysis on Freeways in Context of Highway Capacity Manual
• Effect of Inclement Weather on Two Capacity Flows at Recurring Freeway Bottlenecks
• Ensemble Tree Approach to Estimating Work Zone Capacity
• Equilibrium of Probabilities for Estimating Distribution Function of Critical Gaps at Unsignalized Intersections
• Estimating Right-Turn-on-Red Capacity for Dual Right-Turn Lanes at Signalized Intersections
• Estimation of Capacity Drop in Highway Merging Sections
• Evaluating the Effects of Signal Countdown Timers on Queue Discharge Characteristics at Signalized Intersections in China
• Field Data for Evaluating 2010 Highway Capacity Manual Operational Analysis Methodology for Interchange Ramp Terminals
• Implementing Auxiliary Through Lanes in Context of Highway Capacity Analysis
• Models for Estimating Drivers Following on Two-Lane Rural Highways
• Operational Performance and Speed–Flow Relationships for Basic Managed Lane Segments
• Rationale for Incorporating Queue Discharge Flow into Highway Capacity Manual Procedure for Analysis of Freeway Facilities