01370332

Component

https://doi.org/10.3141/2286-11

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

Managed lane facilities, including high-occupancy vehicle (HOV) lanes, high-occupancy toll lanes, and express lanes, have become attractive tools for managing today’s transportation system. Although managed lanes, specifically, HOV lanes, have existed for several decades, there has been little documentation of their traffic flow behaviors. Because these facilities tend to take on a variety of configurations, including different numbers of managed lanes and separation types from abutting general purpose lanes, transportation engineers should understand the traffic flow differences among facility types. An understanding of the interaction between managed lanes and parallel general purpose lanes is also needed for assessing the performance of managed lanes. A study was done to investigate the performance and traffic flow behavior of managed lane facilities at sites across the country. Traffic flow behavior for five facility types, based on separation type and number of lanes, was analyzed. Factors such as frictional impact on the managed lane—caused by poor performance of the general purpose lanes and slow vehicle effects on managed lane facilities where passing is prohibited—were considered in development of a set of speed–flow curves for each of the five basic facility types. These speed–flow relationships are expressed similarly to basic freeway segments in the Highway Capacity Manual and can be readily incorporated into the manual for predicting the performance of combined general purpose and managed lane facilities.

01450371

12-2291

English

pp 94–104

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223263

Print

Figures; References; Tables

Flow speed relationships; General purpose lanes; High occupancy vehicle lanes; Highway capacity; Managed lanes; Traffic flow

Operational performance

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
• Evaluating the Operational Impact of Left-Turn Waiting Areas 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
• Rationale for Incorporating Queue Discharge Flow into Highway Capacity Manual Procedure for Analysis of Freeway Facilities