00308577

Component

http://onlinepubs.trb.org...s/trr/1979/722/722-003.pdf

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

This report describes the status of freeway priority lanes in the United States, the development of a freeway priority-lane simulation model (FREQ6PL), and the application of the model to a real-life situation. Of the five feasible types of priority lanes, normal-flow exclusive lanes that reserve one or more lanes for priority vehicles are the most prevalent. FREQ6PL can simulate one or more lanes used exclusively by priority vehicles (buses only or vehicles of either three or more or two or more occupants). Three points in time are simulated: the before situation (no exclusive lane), the short-term after situation (the first day of operations with no traveler demand responses), and the longer-term after situation (3-6 months later, after spatial and modal shifts). Performance is measured by an integrated measure of effectiveness that includes costs of travel time, fuel consumption, and vehicle emissions and facility operating and maintenance costs. The model was applied to the Santa Monica Freeway in two parts: (a) to the priority cut-off limit, number of reserved lanes, and length of the exclusive lane and (b) to different parallel arterial speeds, different levels of arterial spare capacity, and different hypothetical mode shifts. It was concluded that reserving an existing or added freeway lane on such a freeway will at best make its performance as good as before and at worst significantly poorer in both the short- and longer-term situations. /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

pp 16-26

1979

Transportation Research Record

0309029724

Print

Figures (12) ; References (17)

Before and after studies; Bus priority; Freeways; Fuel consumption; High occupancy vehicle lanes; High occupancy vehicles; Maintenance management; Measures of effectiveness; Modal diversion; Operating costs; Pollutants; Simulation; Speed; Traffic lanes; Travel time

Maintenance costs

Energy; Highways; Operations and Traffic Management; Public Transportation

TRIS, TRB

Apr 22 1980 12:00AM

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• AUTOMOBILE DIVERSION: A STRATEGY FOR REDUCING TRAFFIC IN SENSITIVE AREAS
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• 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
• FREFLO: A MACROSCOPIC SIMULATION MODEL OF FREEWAY TRAFFIC
• 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