00732381

Component

https://doi.org/10.3141/1555-05

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

The current design procedure shown in Calculation 6 of the "Highway Capacity Manual" (HCM) requires an exhaustive analysis of a family of possible solutions. The design is selected on the basis of minimum speeds of weaving and nonweaving vehicles for different levels of service. In this paper the use of the INTEGRATION modeling tool to evaluate the same family of possible solutions is examined. Because INTEGRATION has the ability to determine volumes in addition to speeds, it was used to select the design solution based on the ratio of demand volume to capacity. Both procedures determined that five-lane Type B weaving sections greater than 610 m (2,000 ft) in length would provide level-of-service C for the origin-destination demand pattern found in Example Calculation 6 in Chapter 4 of the HCM. Analysis of the design results also showed that the number of lanes in the core area was the most critical factor in determining weaving section capacity. The length of the core area was also found to have an impact but was less important as core area was also found to have an impact but was less important as core length increased. Finally, the type of weaving section was found to have the least impact on capacity, especially at core areas longer than 305 m (1,000 ft).

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

English

p. 33-41

1996

Transportation Research Record

0309059526

Figures (10) ; References (5) ; Tables (4)

Computer models; Design; Highway capacity; Length; Level of service; Microsimulation; Motor vehicles; Simulation; Speed; Traffic lanes; Traffic speed; Traffic volume; Weaving sections

Highway Capacity Manual

Design; 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
• ONE-SIDED WEAVING OPERATIONS ON ONE-WAY FRONTAGE ROADS
• 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