CAPACITY OF ARTERIAL NETWORK LINKS

THE NEED FOR CAPACITY DATA AND THE METHODS USED TO DETERMINE CAPACITY FROM THE ARTERIAL STREET NETWORK INVENTORY FOR LONG-RANGE TRANSPORTATION PLANNING PURPOSES ARE DISCUSSED. THE METHOD OF TRAFFIC ASSIGNMENT USED IN THE SEWRPC REGIONAL LAND USE-TRANSPORTATION STUDY IS BASED ON THE ASSUMPTION THAT EACH TRAVELER DESIRES TO USE THE QUICKEST ROUTE BETWEEN HIS POINTS OF ORIGIN AND DESTINATION. OBSERVATION OF ACTUAL TRAFFIC UNDER CONDITIONS OF CONGESTION HAVE PROVIDED EMPIRICAL RELATIONSHIPS BETWEEN SPEED AND THE RATIO OF VOLUME TO CAPACITY WHERE CAPACITY IS A MEASURE OF THE ABILITY OF THE INTERSECTION TO ACCOMMODATE TRAFFIC. FROM SUCH EMPIRICAL STUDIES, ANALYTICAL RELATIONS HAVE BEEN DERIVED WHICH APPROXIMATE THE EMPIRICAL DATA AND WHICH CAN BE USED TO COMPUTE SPEEDS AND, HENCE, TRAVEL TIMES CORRESPONDING TO VARIOUS VOLUME TO CAPACITY RATIOS FOR LINKS IN A NETWORK. LINK CAPACITY WAS CALCULATED FOR EACH LINK IN THE HIGHWAY ASSIGNMENT NETWORK, AND THE RESULTS POSTED ON NETWORK MAPS. CORRECTED LINK CAPACITIES WILL BE USED IN A RESTRAINED ASSIGNMENT OF VEHICLE TRIPS DETERMINED FROM THE O & D SURVEYS. REFERENCES' INVENTORY OF THE ARTERIAL STREET NETWORK, TECHNICAL RECORD, SEWRPC, VOL. 1, NO. 5. A METHOD FOR PREDICTING SPEEDS THROUGH SIGNALIZED STREET INTERSECTIONS, E. W. CAMPBELL, L. E. KEEFER, R. ADAMS, HRB BULLETIN 230, JANUARY 1959. INTERIM TECHNICAL REPORT IV, MEASUREMENT OF HIGHWAY CAPACITY, PATS, 1960. TRAFFIC ASSIGNMENT MANUAL, USBPR, JUNE 1964.

• Supplemental Notes:
  • The TechnicAL RECORD, VOL 2, NO 2, PP 1-12, 8 FIG, 1 TAB
• Corporate Authors:

  SOUTHEASTERN WISCONSIN REGIONAL PLANNING

  P.O. BOX 1607
  OLD COURTHOUSE, 916 N. EAST AVE, ZZ WAUKESHA   
• Authors:
  • Sheridan, R B
• Publication Date: 1964-12

Subject/Index Terms

• TRT Terms: Arterial highways; Data collection; Empirical methods; Highway capacity; Intersections; Land use planning; Mapping; Network links; Networks; Origin and destination; Roads; Streets; Traffic assignment; Traffic congestion; Traffic speed; Traffic volume; Transportation planning; Travel time
• Uncontrolled Terms: Intersection capacity; Linkages
• Geographic Terms: Wisconsin
• Old TRIS Terms: Roadnet
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225103
• Record Type: Publication
• Source Agency: Urban Transp Plng Abstracts /Prelim
• Files: TRIS
• Created Date: Jul 29 1994 12:00AM