USE OF AN EMERGENCY CALL-BOX SYSTEM ON AN URBAN FREEWAY

A PUSH-BUTTON CALL-BOX SYSTEM WAS INSTALLED ON AN 11-MILE SECTION OF I-45 IN HOUSTON. THE SYSTEM IS COMPOSED OF 65 MASTER AND 80 SECONDARY BOXES SPACED AT 1/4-MILE INTERVALS ON THE FREEWAY AND A RECEIVING CONSOLE LOCATED AT THE HOUSTON POLICE DEPARTMENT. STRANDED MOTORISTS MAY SEND REQUESTS FOR 4 TYPES OF AID: POLICE, AMBULANCE, FIRE, AND SERVICE. USE DATA FOR A 6-MONTH PERIOD WERE COLLATED. DURING THIS PERIOD 1,025 CALLS WERE PLACED FOR A DAILY AVERAGE OF 5.6 CALLS AND A USE RATE OF 6.3 CALLS PER MILLION VEHICLE-MILES. RATE OF USE OF A GIVEN BOX WAS FOUND TO BE A FUNCTION OF THE DISTANCE TO ALTERNATE ASSISTANCE. ONE-THIRD OF THE CALLING MOTORISTS HAD LEFT THE SCENE BEFORE SERVICE ARRIVED. USE AND DRIVER INTERVIEW DATA INDICATED THAT DIRVER UNDERSTANDING AND ACCEPTANCE OF THE SYSTEM WERE NOT COMPLETE. MORE THAN ONE-THIRD OF THE DISABLED MOTORISTS WERE NOT AWARE OF THE SYSTEM, WHILE ANOTHER ONE-THIRD INDICATED THAT THEY DID NOT USE THE SYSTEM BECAUSE OF THE COSTS ($6.00 TO $18.50, DEPENDING ON SERVICE REQUIRED) INVOLVED WHEN REQUESTING SERVICE. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1971/358/358-001.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309019737
• Supplemental Notes:
  • Sponsored by Committee on Communications and presented at the 50th Annual Meeting. 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:
  • Goolsby, Merrell E
  • McCasland, William R
• Publication Date: 1971

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 1-7
• Monograph Title: Communications and emergency services
• Serial:
  • Highway Research Record
  • Issue Number: 358
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Call boxes (Driver aid devices); Communication systems; Crash reports; Disasters and emergency operations; Hazards and emergency operations; Urban highways
• Old TRIS Terms: Call boxes
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226142
• Record Type: Publication
• ISBN: 0309019737
• Report/Paper Numbers: HS-011 999
• Files: TRIS, TRB
• Created Date: Mar 7 1972 12:00AM