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A MULTIVARIATE ANALYSIS OF VEHICULAR SPEEDS ON FOUR-LANE RURAL HIGHWAYS

PRIOR TO DEVELOPING NEW WARRANTS FOR SPEED LIMITS IT WAS NECESSARY TO EVALUATE THE VARIABLES THAT REPRESENT THE DRIVER, THE VEHICLE, THE ROADWAY,ENVIRONMENTAL CHARACTERIS- TICS AND TRAFFIC CONDITIONS. A MULTIVARIATE ANALYSIS WAS CONDUCTED OF VEHICULAR SPEEDS ON FOUR LANE RURAL HIGHWAYS IN ILLINOIS. THIRTY-EIGHT VARIABLES WERE MEASURED AT 83 STUDY SITES. THE FACTORS WHICH CONTRIBUTED TO THE GREATEST VARIATION IN MEAN SPOT SPEED WERE DETERMINED BY MULTIPLE CORRELATION AND LINEAR REGRESSION ANALYSIS. THESE VARIABLES WERE OUT-OF-STATE PASSENGER CARS, MINIMUM SIGHT DISTANCE, POSTED SPEED LIMIT AND THE NUMBER OF ROADSIDE ESTABLISHMENTS . CERTAIN FACTORS WERE THEN SELECTED AND A FACTOR ANALYSIS WAS CONDUCTED. SPEED PREDICTION EQUATIONS AND MATHEMATICAL MODELS WERE DEVELOPED AND TESTED.

Record URL:
- http://onlinepubs.trb.org/Onlinepubs/hrr/1965/72/72-001.pdf
Supplemental Notes:
- 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
Authors:
- Wortman, Robert H
Publication Date: 1965

Media Info

Media Type: Print
Features: Figures; References; Tables;
Pagination: pp 1-18
Monograph Title: Traffic flow characteristics 1963 and 1964
Serial:
- Highway Research Record
- Issue Number: 72
- Publisher: Highway Research Board

Subject/Index Terms

TRT Terms: Automobiles; Businesses; Correlation analysis; Equations; Factor analysis; Forecasting; Four lane highways; Highways; Linear regression analysis; Mathematical models; Multivariate analysis; Numbers; Regression analysis; Roadside; Rural highways; Sight distance; Speed limits; Spot speed; Traffic flow; Traffic speed; Variables; Warrants (Traffic control devices)
Old TRIS Terms: Conditions; Establishments; Multiple correlation; Out-of-state; Variations
Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management;

Filing Info

Accession Number: 00224759
Record Type: Publication
Files: TRIS, TRB
Created Date: Mar 8 1994 12:00AM