00732382

Component

https://doi.org/10.3141/1555-06

http://scholar.google.com...wlin&publication_year=1996

Weaving vehicles can heavily affect the quality of service on a facility. Techniques to evaluate weaving on arterial streets, however, are limited. Similar to arterial streets, the traffic operations on frontage or access roads along freeways can also be heavily affected by weaving. Presented here is a technique for evaluating one-sided weaving areas along with recommended lengths of weaving areas. Data from six sites were used to develop a relationship between number of lane changes and weaving volume. The weaving sections at the sites ranged from three to four lanes and from approximately 137 to 335 m in length. Throughout the large range of volumes present (250 to 2,500 vph), there was a very strong relationship between weaving volume and lane changes. The field data were used to develop a computer simulation model. The relationships between different measures of effectiveness from the simulation model provided information on critical points in which the weaving speed begins to drop more rapidly. Weaving volumes (entrance-ramp plus exit-ramp volumes) of less than 1,500 vph are associated with unconstrained levels of service, volumes between 1,500 and 3,000 vph with constrained service, and volumes over 3,000 vph with undesirable service. Additional information from the models also demonstrated that it is desirable to have a weaving length greater than 300 m. If this length is not achievable, then the minimum length should be approximately 200 m.

This paper appears in Transportation Research Record No. 1555, Highway Capacity Analysis for Interrupted and Uninterrupted Flow Facilities.

English

p. 42-49

1996

Transportation Research Record

0309059526

Figures (9) ; References (3) ; Tables (2)

Access roads; Field studies; Frontage roads; Lane changing; Length; Level of service; Measures of effectiveness; Simulation; Traffic volume; Weaving sections

Field data

Highways; Operations and Traffic Management; I71: Traffic Theory

TRIS, TRB

Feb 13 1997 12:00AM

• ACCOUNTING FOR NONRANDOM ARRIVALS IN ESTIMATE OF DELAY AT SIGNALIZED INTERSECTIONS
• ANALYSIS OF TRAFFIC OPERATIONS AT ALL-WAY STOP-CONTROLLED INTERSECTIONS BY SIMULATION
• ASSESSING HEAVY VEHICLE IMPACTS ON OPERATION OF RURAL AT-GRADE INTERSECTIONS IN BRAZIL
• CAPACITY AT UNSIGNALIZED TWO-STAGE PRIORITY INTERSECTIONS
• COMPARISON OF PLANNING AND OPERATIONAL ANALYSIS PROCEDURES FOR SIGNALIZED INTERSECTIONS FROM THE "HIGHWAY CAPACITY MANUAL"
• ESTIMATING INTERSECTION APPROACH DELAY USING 1985 AND 1994 "HIGHWAY CAPACITY MANUAL" PROCEDURES
• EVALUATING WEAVING SECTION DESIGNS USING INTEGRATION
• OVERFLOW DELAY MODEL FOR SIGNALIZED ARTERIALS
• PHASE TIME PREDICTION FOR TRAFFIC-ACTUATED INTERSECTIONS
• PROGRESSION FACTOR FOR QUEUE LENGTH AND OTHER QUEUE-RELATED STATISTICS
• SATURATION FLOW AND CAPACITY OF SHARED LANES: COMPARATIVE EVALUATION OF ESTIMATION METHODS
• STOCHASTIC MODELING OF SHARED-LANE LEFT-TURN PROCESS AND ITS EFFECT ON SATURATION FLOW
• TRUCK PERFORMANCE ON ARGENTINEAN HIGHWAYS
• VARIABILITY OF SPEED-FLOW RELATIONSHIPS ON GERMAN AUTOBAHNS