Heat Transfer Analysis on Road Surface Temperature Near a Traffic Light

This paper aims at examining the thermal influence of vehicle related heats (vehicle heats) on the road surface temperature and evaluating the validity of a vehicle road freezing forecasting (VRFF) model proposed by the present authors. Vehicle heats consist of the tire frictional heat, the vehicle radiant heat emitted downward from the bottom of a vehicle and the vehicle sensible heat due to vehicle-induced wind. In order to calculate the road surface temperature in a vehicle-passage area, the three vehicle heat fluxes are included in a heat balance equation of the road surface layer in addition to metrological heat fluxes. A thermography observation targeted a roadway near a traffic light in Fukui city that has two-three lanes each way. Stopping and starting of vehicles (vehicles stop and go) are repeated due to the traffic light on only one side all day. It was shown that the difference in the road surface temperature on the lane between with and without the vehicles stop and go became clear as an atmospheric temperature fell. For example, the former was about 3.5°C higher than the latter in the nighttime. This is caused by the tire frictional heat and the vehicle radiant heat. The validity of the VRFF model was identified by comparing the calculated road surface temperature with the experimental one obtained from the thermography observation. The VRFF model could reproduce almost the same temperature rise due to the vehicle heats as the outcome of the thermography observation.

• Corporate Authors:

  ITS Japan

  Tokyo,   Japan 

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036

  ERTICO

  326 Avenue Louis
  Brussels,   Belgium  B-1050
• Authors:
  • Fujimoto, Akihiro
  • Saida, Akira
  • Fukuhara, Teruyuki
  • Futagami, Tanehiro
• Conference:
  • 17th ITS World Congress
  • Location: Busan , Korea, South
  • Date: 2010-10-25 to 2010-10-29
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 12p
• Monograph Title: 17th ITS World Congress, Busan, 2010: Proceedings

Subject/Index Terms

• TRT Terms: Heat flux; Heat transfer; Mathematical models; Motor vehicles; Surface course (Pavements); Surface temperature; Temperature; Tires; Traffic signals
• Subject Areas: Highways; Operations and Traffic Management; Vehicles and Equipment; I70: Traffic and Transport; I90: Vehicles;

Filing Info

• Accession Number: 01354757
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 24 2011 11:03AM