00732387

Component

https://doi.org/10.3141/1555-11

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

A simulation model was used to assess the impacts of trucks on the capacity of rural, at-grade, stop-controlled intersections in Brazil. The major differences between Brazilian and North American vehicles and intersections are discussed and a system for vehicle classification that reflects the characteristics of Brazilian vehicles is proposed. The proposed simulation model assumes that there is an endless queue of vehicles that approaches the intersection from the minor road. Gaps in the major road traffic flow are generated using a displaced exponential distribution. Crossing times and gap acceptance are modeled by logit models fitted for each vehicle category. Heavy vehicle equivalence factors are calculated as the average number of passenger cars that are able to cross the major road during the time required by each truck type to execute the same maneuver. The capacity estimates obtained with the model are similar to values calculated with Siegloch's model, which is the basis for the "Highway Capacity Manual" (HCM) procedure. The equivalence factors estimated for trucks are considerably higher than those suggested in the HCM for most truck categories.

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

English

p. 83-90

1996

Transportation Research Record

0309059526

Figures (3) ; References (14) ; Tables (6)

Gap acceptance; Heavy vehicles; Highway capacity; Impacts; Intersections; Logits; Rural areas; Simulation; Trucks

Crossing times; Intersection capacity; Minor roads; Rural intersections

Brazil

Highways; Motor Carriers; 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
• 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
• 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