00804646

Component

https://doi.org/10.3141/1737-05

http://scholar.google.com...isar&publication_year=2000

As urban and suburban intersections become more congested, a likely remedy for recurring traffic jams is grade separation in the form of diamond or tight diamond interchanges. A more economical intersection configuration to relieve congestion has been built overseas. The major highway is separated into two-directional, one-way roads comparable to an at-grade diamond junction known as the split intersection. The split intersection facilitates smoother flows with less driver delay, mainly by reducing the number of required signal phases from four to three. The success of converting to the split intersection has been analyzed by using deterministic methods that showed increased capacity and noticeable reduction in delay. The analysis methodology relies on a microsimulation technique to predicate previous claims and provide economic benefits. Comparisons of vehicular delay between the single and the split intersection revealed substantial savings in travel delay, particularly for higher entering volumes and higher left-turning movements. The findings provide guidance to planners and designers on the expected benefits of converting a four-lane by four-lane single intersection to the split intersection.

This paper appears in Transportation Research Record No. 1737, Geometric Design and Effects on Traffic Operations 2000.

English

p. 34-41

2000

Transportation Research Record

0309067405

Figures (14) ; References (8) ; Tables (2)

Benefits; Cost effectiveness; Four lane highways; Highway capacity; Microsimulation; Traffic congestion; Traffic delays

Split intersections

Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure

TRIS, TRB, ATRI

Jan 11 2001 12:00AM

• ACCELERATION CHARACTERISTICS OF STARTING VEHICLES
• ANALYZING INFLUENCE OF GEOMETRIC DESIGN ON OPERATING SPEEDS ALONG LOW-SPEED URBAN STREETS: MIXED-MODEL APPROACH
• DESIGN OF ROUNDABOUTS IN FRANCE: HISTORICAL CONTEXT AND STATE OF THE ART
• EFFECTS OF HORIZONTAL CURVATURE ON DRIVER VISUAL DEMAND
• EFFECTS OF RIGHT-TURN LANES ON DRIVEWAY SIGHT DISTANCE
• EVALUATING HORIZONTAL ALIGNMENT DESIGN CONSISTENCY OF TWO-LANE RURAL HIGHWAYS: DEVELOPMENT OF NEW PROCEDURE
• KINEMATIC APPROACH TO HORIZONTAL CURVE TRANSITION DESIGN
• PREDICTING OPERATING SPEEDS ON TANGENT SECTIONS OF TWO-LANE RURAL HIGHWAYS
• SPEED-PROFILE MODEL FOR TWO-LANE RURAL HIGHWAYS
• TURN LANE STORAGE LENGTH DESIGN: THEORY FOR THE PRACTITIONER
• UTILIZATION OF AUXILIARY THROUGH LANES AT INTERSECTIONS OF FOUR-LANE, TWO-WAY ROADWAYS