00824488

Component

https://doi.org/10.3141/1776-02

http://scholar.google.com...oess&publication_year=2001

The publication of the "fourth" full edition of the "Highway Capacity Manual" (HCM) in the fall of 2000 represented a major step forward in state-of-the-art highway capacity and quality-of-service analyses. Even as this major step is taken, however, old issues reemerge and new ones arise as to the core concepts involved, the directions that such analyses should take in the future, and the needs of HCM users. Now that HCM has begun to address system and multimodal measures, the nature and meaning of capacity and level-of-service concepts need to be reexamined. The role of simulation must be more clearly defined, as must the limitations of more conventional highway capacity analyses. As databases improve, the question of statistical accuracy and stochastic variations in standard measures may seem more important, even though the inherent variability in traffic flow characteristics remains essentially unchanged. The need for software to implement ever more complex methodologies raises additional issues. As the Committee on Highway Capacity and Quality of Service and its members consider these and other important issues, an attempt to outline the major issues and alternatives that should be examined is made. In addition, some suggestions as to potential paths to follow are provided.

This paper appears in Transportation Research Record No. 1776, Traffic Flow Theory and Highway Capacity 2001.

English

p. 10-16

2001

Transportation Research Record

0309072344

References (13)

Accuracy; Future; Highway capacity; Quality of service; Research; Software; State of the art studies; Statistical analysis; Stochastic processes; Traffic flow; Traffic simulation

Highway Capacity Manual

Data and Information Technology; Highways; Operations and Traffic Management; Research; I71: Traffic Theory

TRIS, TRB

Feb 4 2002 12:00AM

• ANALYSIS OF ARRIVAL TYPE ESTIMATION PROCEDURES
• CAPACITY AN UNSIGNALIZED INTERSECTIONS DERIVED BY CONFLICT TECHNIQUE
• CAPACITY ESTIMATIONS FOR TYPE B WEAVING AREAS BASED ON GAP ACCEPTANCE
• CHARACTERISTICS OF PASSING AND MEETING MANEUVERS ON EXCLUSIVE BICYCLE PATHS
• DEFINING FREEWAY CAPACITY AS FUNCTION OF BREAKDOWN PROBABILITY
• DELAY MODEL FOR PLANNING ANALYSIS OF MAIN-LINE TOLL PLAZAS
• DELAY MODEL FOR RIGHT-TURN LANES AT SIGNALIZED INTERSECTIONS WITH UNIFORM ARRIVALS AND RIGHT TURNS ON RED
• DERIVATION OF CAPACITY EQUATION FOR ROUNDABOUT ENTRY WITH MIXED CIRCULATING AND EXITING FLOWS
• EFFECT OF WEATHER ON FREE-FLOW SPEED
• ESTIMATING VEHICLE STOPS AT UNDERSATURATED AND OVERSATURATED FIXED-TIME SIGNALIZED INTERSECTIONS
• ESTIMATION OF DE FACTO LEFT-TURN LANES AT SIGNALIZED INTERSECTIONS
• EXAMINATION OF EFFECT OF DRIVER POPULATION AT FREEWAY RECONSTRUCTION ZONES
• FREEWAY NETWORK SIMULATION AND DYNAMIC TRAFFIC ASSIGNMENT WITH METANET TOOLS
• FREEWAY QUALITY OF SERVICE: WHAT REALLY MATTERS TO DRIVERS AND PASSENGERS?
• FREEWAY SYSTEMS RESEARCH BEYOND "HIGHWAY CAPACITY MANUAL" 2000
• INTERVAL DISTRIBUTION FOR EXCLUSIVE, MIXED-USE BICYCLE PATHS
• INVESTIGATION OF DENSITY AND FLOW RELATIONSHIPS IN CONGESTED TRAFFIC WITH VIDEOGRAMMETRIC DATA
• MODEL OF FREE-FLOW SPEED FOR INDIANA ARTERIAL ROADS
• MULTIMODAL LEVEL-OF-SERVICE ANALYSIS AT PLANNING LEVEL
• MULTIVARIATE VEHICULAR TRAFFIC FLOW PREDICTION: EVALUATION OF ARIMAX MODELING
• NONLOCAL CONTINUOUS-SPACE MICROSCOPIC SIMULATION OF PEDESTRIAN FLOWS WITH LOCAL CHOICE BEHAVIOR
• PERCENT TIME-SPENT-FOLLOWING AS PERFORMANCE MEASURE FOR TWO-LANE HIGHWAYS
• PREDICTING RIGHT TURNS ON RED
• SATURATION FLOW ESTIMATION BY TRAFFIC SUBGROUPS
• SHOCK WAVE AND CUMULATIVE ARRIVAL AND DEPARTURE MODELS: PARTNERS WITHOUT CONFLICT
• SIMULATION-BASED STUDY OF TRAFFIC OPERATIONAL CHARACTERISTICS AT ALL-WAY-STOP-CONTROLLED INTERSECTIONS
• STOCHASTIC MODELING AND DESIGN OF VEHICULAR AND PEDESTRIAN NETWORKS
• USE OF IMAGE ANALYSIS TO ESTIMATE AVERAGE STOPPED DELAYS PER VEHICLE AT SIGNALIZED INTERSECTIONS