00983183

Component

https://doi.org/10.3141/1881-01

http://scholar.google.com...ared&publication_year=2004

Although the concepts of the crossover displaced left-turn (XDL) intersection (also called the continuous flow intersection) were developed approximately four decades ago, there is no simplified procedure to evaluate its traffic performance and to compare this intersection with conventional intersections. Several studies have shown the qualitative and quantitative benefits of the XDL intersection without providing accessible tools for traffic engineers and planners to estimate average control delays and queues. Modeling was conducted on typical geometries over a wide distribution of traffic flow conditions for three different design configurations or cases using VISSIM simulations with pretimed signal settings. Some comparisons with similar conventional designs showed considerable savings in average control delay, as well as average queue length and increase in intersection capacity. The statistical models provided an accessible tool for the practitioner to assess average delay and average queue length for three types of XDL intersections. Finally, a preferred signal setting was developed for each of the five intersections of the XDL network.

This paper appears in Transportation Research Record No. 1881, Geometric Design and the Effects on Traffic Operations 2004.

00983182

English

p. 1-10

2004

Transportation Research Record

0309094771

Figures (11) ; References (9) ; Tables (3)

Geometric design; Signalized intersections; Traffic delays; Traffic models; Traffic queuing; Traffic signal timing; Traffic simulation

VISSIM (Computer model)

Average control delay; Crossover displaced left turn intersections; Intersection capacity

Design; Highways; Operations and Traffic Management; Planning and Forecasting; I21: Planning of Transport Infrastructure

TRIS, TRB, ATRI

Dec 2 2004 12:00AM

• BASIS OF THE SWISS DESIGN STANDARD FOR ROUNDABOUTS
• DETERMINING CRITICAL LENGTH OF GRADE FOR GEOMETRIC DESIGN OF VERTICAL ALIGNMENTS
• DEVELOPMENT OF THE DISPLACED RIGHT-TURN INTERSECTION
• FUZZY MODEL FOR SAFETY EVALUATION PROCESS OF NEW AND OLD ROADS
• GEOMETRIC MODELS TO CALCULATE INTERSECTION SIGHT DISTANCE FOR UNPROTECTED LEFT-TURN TRAFFIC
• HIGHWAY DESIGN CONSISTENCY: REFINING THE STATE OF KNOWLEDGE AND PRACTICE
• INFLUENCE OF SPEEDS ON DESIGN STANDARDS IN SWITZERLAND
• LENGTHS OF DOUBLE OR DUAL LEFT-TURN LANES