PREDICTING TRAFFIC ACCIDENTS FROM ROADWAY ELEMENTS ON URBAN EXTENSIONS OF STATE HIGHWAYS
THE OREGON STATE HIGHWAY DEPARTMENT DEVELOPED EQUATIONS THAT CAN BE USED TO PREDICT ACCIDENTS ON THE URBAN EXTENSIONS OF THE STATE HIGHWAY SYSTEM FROM ROADWAY ELEMENTS SUCH AS ADT, COMMERCIAL AND RESIDENTIAL UNITS AND DRIVEWAYS, INTERSECTIONS, SIGNALIZED INTERSECTIONS, INDICATED SPEED, PAVEMENT WIDTH, EFFECTIVE LANE WIDTH, AND THE NUMBER OF LANES. THE STUDY UTILIZED A SAMPLE OF 426 SECTIONS WITH A TOTAL LENGTH OF 186.4 MI. DATA WERE ANALYZED BY SUBGROUPING THE SECTIONS BY NUMBER OF TRAFFIC LANES AND ADT GROUPINGS. WITHIN THESE GROUPS ADDITIONAL SUBGROUPS OF URBAN EXTENSIONS WERE STUDIED FOR SUBURBAN, CORPORATE, BUSINESS, RESIDENTIAL AND MIXED CULTURE SECTIONS. THE ANALYSIS USED MULTIPLE CORRELATION TECHNIQUES WITH THE END RESULT OF THE ANALYSIS BEING A SERIES OF EQUATIONS WHICH INDICATED THE RELATIONSHIP OF THE VARIOUS ROADWAY ELEMENTS TO ACCIDENT RATES ON URBAN AND SUBGROUPS OF URBAN EXTENSIONS OF HIGHWAYS IN OREGON. THE MORE IMPORTANT CONCLUSIONS WHICH CAN BE DRAWN FROM THE STUDY ARE: (1) MOTOR VEHICLE ACCIDENT RATES ARE RELATED TO CERTAIN PHYSICAL FEATURES OF URBAN EXTENSIONS OF THE HIGHWAY SYSTEM. (THIS RELATIONSHIP IS STRONG ENOUGH IN THE HIGHER ADT RANGES TO MAKE IT POSSIBLE TO PREDICT ACCIDENT RATES WITH A REASON- ABLE DEGREE OF ACCURACY ON THE BASIS OF KNOWN PHYSICAL FEATURES). (2) ACCIDENT RATES ON LOW VOLUME ROADS DO NOT HAVE A STRONG RELATIONSHIP WITH ANY ROADWAY FEATURE. (3) MOTOR VEHICLE ACCIDENT RATES INCREASE WHEN: (1) THE NUMBER OF COMMERCIAL UNITS ADJACENT TO THE SECTION INCREASES, (2) THE NUMBER OF TRAFFIC SIGNALS INCREASES, (3) THE NUMBER OF INTERSECTIONS INCREASES, (4) THE INDICATED SPEED DECREASES, (5) THE AVERAGE DAILY TRAFFIC INCREASES, AND (6) THE PAVEMENT WIDTH INCREASES. /AUTHOR/
- Record URL:
-
Supplemental Notes:
- No 208, pp 45-63, 8 FIG, 9 TAB, 3 APP 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:
- Head, J A
- Publication Date: 1959
Media Info
- Media Type: Digital/other
- Pagination: 21p
- Monograph Title: Traffic accident studies, 1958
-
Serial:
- Highway Research Board Bulletin
- Issue Number: 208
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Accuracy; Average daily traffic; Business districts; Crash rates; Driveways; Forecasting; Intersections; Pavements; Residential areas; State highways; Traffic crashes; Traffic lanes; Traffic signals; Traffic speed; Traffic volume; Urban highways; Width
- Old TRIS Terms: Commercial districts; Pavement width
- Subject Areas: Highways; Pavements; Safety and Human Factors;
Filing Info
- Accession Number: 00220296
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Apr 21 1994 12:00AM