00308584

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http://onlinepubs.trb.org...s/trr/1979/722/722-010.pdf

https://scholar.google.co...AYNE&publication_year=1979

Three categories of simulation models for freeway traffic have been developed in the past: microscopic, mesoscopic, and macroscopic. Microscopic models represent individual vehicle movements; masoscopic models represent platoon movements; and macroscopic models represent traffic flow in terms of aggregate measures such as density, space-mean-speed, and flow rate. This paper discusses a model in the macroscopic category that is particularly useful for evaluation freeway operations. The model is described in mathematical detail for basic flow simulation, ramp metering and diversion, surveillance, and representation of freeway incidents. Computation of performance measures is also detailed. The simulation model, FREFLO, which is based on the model equations presented, is then described and illustrated with a sample run. /Author/

Publication of this paper sponsored by Committee on Freeway Operations. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01411553

Hauer, E; Hurdle, V F

pp 68-77

1979

Transportation Research Record

0309029724

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Figures (18) ; References (14)

Freeway operations; Ramp metering; Simulation; Traffic diversion; Traffic incidents; Traffic simulation; Traffic surveillance

Incidents; Macroscale

Highways; Operations and Traffic Management

TRIS, TRB

Apr 22 1980 12:00AM

• ANALYSIS OF FREEWAY TRAFFIC TIME-SERIES DATA BY USING BOX-JENKINS TECHNIQUES
• AUTOMOBILE DIVERSION: A STRATEGY FOR REDUCING TRAFFIC IN SENSITIVE AREAS
• DELAY, TIME SAVED, AND TRAVEL TIME INFORMATION FOR FREEWAY TRAFFIC MANAGEMENT
• DEVELOPMENT AND APPLICATION OF A FREEWAY PRIORITY-LANE MODEL
• DEVELOPMENT OF A TRANSPORT SYSTEM MANAGEMENT PLANNING PROCESS IN THE DELAWARE VALLEY REGION
• DEVELOPMENT OF FREEWAY INCIDENT-DETECTION ALGORITHMS BY USING PATTERN-RECOGNITION TECHNIQUES
• EMPIRICAL ANALYSIS OF THE INTERDEPENDENCE OF PARKING RESTRICTIONS AND MODAL USE
• EVALUATION OF THE I-35 ROUTE REDESIGNATION IN SAN ANTONIO
• HIGH-OCCUPANCY VEHICLE CONSIDERATIONS ON AN ARTERIAL CORRIDOR IN PENSACOLA, FLORIDA
• IMPROVED AIR QUALITY THROUGH TRANSPORTATION SYSTEM MANAGEMENT
• INCIDENT-DETECTION ALGORITHMS PART 1. OFF-LINE EVALUATION
• INCIDENT-DETECTION ALGORITHMS. PART 2. ON-LINE EVALUATION
• PLANNING RAIL STATION PARKING: APPROACH AND APPLICATION
• RESULTS OF IMPLEMENTING LOW-COST FREEWAY INCIDENT-MANAGEMENT TECHNIQUES
• SAFETY CONSIDERATIONS IN THE USE OF ON-STREET PARKING