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Title: A QUANTITATIVE EVALUATION OF TRAFFIC IN A COMPLEX FREEWAY NETWORK
Accession Number: 00227781
Record Type: Component
Abstract: THE PROPOSITION THAT TRAVEL TIME IS A FUNDAMENTAL DEPENDENT VARIABLE IN THE ANALYSIS OF TRANSPORTATION SYSTEMS IS DEVELOPED ALONG WITH SEVERAL COROLLARY CONCEPTS. THE PROPOSITION AND SOME OF THE DERIVED CONCEPTS ARE THEN PUT TO TEST IN A DETAILED INVESTIGATION OF TRAFFIC IN A PART OF THE FREEWAY NETWORK IN DOWNTOWN LOS ANGELES. LICENSE PLATE METHODS, INCLUDING DICTATION INTO PORTABLE TAPE AND WIRE RECORDERS AND HIGH-SPEED PHOTOGRAPHY, ARE USED TO OBTAIN BOTH TRAVEL TIME AND THE RELATIVE PERCENTAGES OF TRAFFIC FLOW IN ALL THE COMBINATIONS OF INPUT-OUTPUT FREEWAYS AS WELL AS FREEWAY-RAMP COMBINATIONS. SPEEDS AND HEADWAYS ARE MEASURED BY LANE AT THE OUTPUT BOUNDARY OF THE NETWORK OF INTEREST WHICH IS ON A FREEWAY PROPER. OTHER COVARIATES ARE CLASSIFIED VOLUME COUNTS WHICH ALSO ARE BY LANE ON THE OUTPUT BOUNDARY. A NOVEL MAILING QUESTIONNAIRE IS USED TO ESTABLISH THE SURFACE STREET PATHS DRIVERS PURSUE TO GET TO THE ON-RAMPS OF THE NETWORK.ABOUT 60% OF THE DRIVERS RESPONDED. REPRESENTATIVE OF THE HYPOTHESES TESTED ARE: THE EFFECT OF ON AND OFF-RAMP TRAFFIC ON NETWORK TRAVEL TIME; THE EFFECT OF MULTIAXLE VEHICLES ON NETWORK TRAVEL TIME, (DEDUCED) EFFECTS THAT OPENING PLANNED ADDITIONAL LINKS OF THE FREEWAY SYSTEM WILL HAVE ON THE EXISTING NETWORK. (DEDUCED) EFFECTS THAT CLOSING A RAMP WOULD HAVE ON THE NETWORK AS WELL AS THE ADJACENT SUFRACE STREETS. BESIDES PROVIDING A QUANTITATIVE DESCRIPTION OF TRAFFIC IN THE SELECTED NETWORK, THE STUDY DEMONSTRATES THAT MATHEMATICAL MODELS BASED ON TRAVEL TIME CAN BE APPLIED TO REAL SITUATIONS. ALTHOUGH THERE CAN BE NO FORMAL PROOF OF THE IMPORTANCE OF THESE MODELS, THE FACT THAT THEY YIELD USEFUL INFORMATION IN THIS CASE SUGGESTS THAT MORE GENERAL APPLICATIONS MIGHT BE CONSIDERED. /AUTHOR/
Supplemental Notes: No 291, pp 163-206, 20 FIG, 3 TAB, 18 REF. 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.
Monograph Title: Monograph Accession #: 01410675
Language: English
Authors: Brenner, RobertTelford, Edward TFrischer, DonaldPagination: 44p
Publication Date: 1961
Serial: Conference:
40th Annual Meeting of the Highway Research Board
Location:
Washington DC, United States Media Type: Digital/other
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Operations and Traffic Management
Files: TRIS, TRB
Created Date: Aug 15 2004 2:36AM
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