MEASUREMENTS AND CONTROL OF TRUCK SPRAY ON WET ROADS

The problem of the truck spray on wet roads is one that has often been taken up in recent years as obstructing the visibility of the following vehicles and of the road environment. Several measurements were tried to develop an effective method for measuring the truck spray; this led to the development of a technique which has proved most practical and capable of indicating the extent of a spray in terms of handy weight values per unit area. Measurements have been made of (1) the wiper frequency; (2) visual clarity of the preceding vehicle from the following vehicle; (3) photographs of the preceding vehicle, each of which directly indicates the visual obscuration rate, and studied relation between the weight measurement of spray and the visual obscuration rate. It is also pointed out that the spray problem would not occur even with a van truck, which causes the heaviest spray among all types of vehicles now in use, if the following driver is careful enough to maintain a safety interval between his vehicle and the preceding vehicle. Finally, details are given of a new spray protector which, though still in an experimental stage, has succeeded in reducing the volume of the spray by a van truck to one tenth of the current level. /TRRL/

• Supplemental Notes:
  • Sixteenth International Automobile Technology Congress.
• Corporate Authors:

  International Federation of Auto Techniques Engs

  3 Avenue du President Wilson
  F 75116 Paris,   France 

  International Federation of Auto Techniques Engs

  3 Avenue du President Wilson
  F 75116 Paris,   France 
• Authors:
  • Yamanaka, A
  • NAGAIKE, N
• Publication Date: 0

Language

• English

Media Info

• Pagination: p. 1
• Serial:
  • Publication of: International Federation of Auto Techniques Engs
  • Issue Number: 0
  • Publisher: International Federation of Auto Techniques Engs

Subject/Index Terms

• TRT Terms: Conferences; Equipment; Heavy vehicles; Highway safety; Measurement; Motor vehicles; Pavements; Photography; Speed; Splashing; Sprays (Materials); Surface course (Pavements); Trucks; Vehicle spacing; Visibility; Visibility distance; Weight; Weight measurement; Wet weather; Windshield wipers
• Uncontrolled Terms: Decreases; Wet pavements
• Old TRIS Terms: Wipers
• ITRD Terms: 8525: Conference; 9009: Decrease; 3674: Equipment; 1078: Lock (waterway); 6136: Measurement; 6751: Photography; 5408: Speed; 9146: Spray (veh); 694: Vehicle spacing; 6793: Visibility distance; 5485: Weight; 3015: Wet road; 1301: Windscreen wiper
• Subject Areas: Highways; Motor Carriers; Pavements; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00163357
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Jan 13 1978 12:00AM