THE PREDICTION OF RUNNING SPEEDS ON URBAN ARTERIAL STREETS

THE PURPOSE WAS TO DEVELOP A MODEL FOR PREDICTING RUNNING SPEEDS ON URBAN ARTERIAL STREETS. TO SUPPLEMENT THE MODEL, THE MAJOR INFLUENCES ON SPEED, CAUSES OF STOP DELAY AND THEIR AVERAGE VALUES WERE ALSO EVALUATED. USING THESE RESULTS, ONE CAN ESTIMATE THE CHANGE IN AVERAGE RUNNING SPEED AND STOP DELAY TIME BETWEEN AN EXISTING FACILITY AND A PROPOSED OR IMPROVED FACILITY. THE ESTIMATE OF THE BENEFITS GAINED, IN TERMS OF TIME, SPEED, OR MONEY, COULD THEN BE CONTRASTED WITH THE PROPOSED COST. THE DATA COLLECTION WAS CONDUCTED IN NINE INDIANA CITIES HAVING POPULATIONS BETWEEN THIRTY AND ONE HUNDRED AND FIFTY THOUSAND; THE AVERAGE CAR METHOD WAS THE PROCEDURE EMPLOYED FOR COLLECTING THE SPEED-DELAY DATA. PNEUMATIC TUBE TRAFFIC COUNTERS WERE INSTALLED TO DETERMINE THE VOLUMES USING THE STREETS BEING STUDIED. THE PREDICTION MODEL WAS FORMULATED USING STEPWISE REGRESSION. IT UTILIZES ELEVEN ROADWAY AND TRAFFIC CONDITION VARIABLES COMBINED TO FORM TEN TERMS; IT HAS A MULTIPLE CORRELATION COEFFICIENT OF 0.5926 AND A STANDARD ERROR OF ESTIMATE OF 3.417. THE AVERAGE VALUES OF STOP DELAY WERE CALCULATED FROM DATA COLLECTED IN THE SPEED-DELAY STUDIES CONDUCTED IN NINE CITIES. TRAFFIC SIGNALS WERE FOUND TO BE THE MAJOR SOURCE OF STOP DELAYS, CONTRIBUTING OVER EIGHTY PERCENT OF THE TOTAL. /AUTHOR/

• Supplemental Notes:
  • No 20, 80 PP, FIGS, TABS, 3 APP
• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

  Purdue University, School of Civil Engineering
  West Lafayette, IN  United States  47907-1284
• Authors:
  • Shackman, K A
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Arterial highways; Mathematical models; Running speed; Speed and delay studies; Stopped time delays; Streets; Traffic speed; Urban areas
• Uncontrolled Terms: Models
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00227345
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 17 1972 12:00AM