WEATHER AND DRIVING SPEEDS: LONG-TERM STUDY ON A MAIN ROAD

SAAN JA KELIN VAIKUTUS AJONOPEUKSIIN: PITKAAIKAISSEURANTA VALTATIE

This article reports on a system for long-term collection of both speed and vehicle-type data developed at the Traffic Research Unit, University of Helsinki. Using inductive loops, the system is capable of classifying vehicle types correctly in about 95% of cases, and is capable of storing speed, time headway and type data for each individual vehicle for periods of several weeks unattended. Maximum speed decrements were about 20% below the normal level. Additionally, some decrease in traffic volume with respect to typical figures, maximum 17%, was also found during week-ends, connected with fog and other adverse weather conditions. (TRRL)

• Corporate Authors:

  Finnish Road Association

  Vironkatu 6
  00170 Helsinki 17,   Finland 
• Authors:
  • SUMMALA, H
• Publication Date: 1984

Language

• Finnish

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 52-56
• Serial:
  • TIE JA LIIKENNE
  • Volume: 54
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Automatic control; Automation; Classification; Data banks; Data collection; Equipment; Loop detectors; Measurement; Motor vehicles; Pavements; Snow; Speed; Surface course (Pavements); Traffic speed; Traffic volume; Vehicle classification; Vehicles; Weather; Wet weather
• Uncontrolled Terms: Wet pavements
• ITRD Terms: 3882: Automatic; 8513: Classification; 8623: Data acquisition; 8614: Database; 3674: Equipment; 6136: Measurement; 2552: Snow; 5408: Speed; 1255: Vehicle; 2545: Weather; 3015: Wet road
• Subject Areas: Highways; Operations and Traffic Management; Pavements; Planning and Forecasting; Vehicles and Equipment; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00399845
• Record Type: Publication
• Source Agency: VTT Technical Research Centre of Finland
• Files: ITRD, TRIS
• Created Date: Aug 25 2004 2:46AM