Development of pavement to absorb an electric wave

Electric Toll Collection (ETC) has been spreading across Japan since December 2001. As ETC is a system which does short-range communication using 5.8GHz radio wave between roadside unit and on-board equipment, the leakage of radio waves cannot be avoided. The direct wave is indispensable to communicate, but the wave after reflected on the walls or the pavements needs to be eliminated so that ETC system can operate correctly. Although the radio wave absorption panels are equipped to restrain reflected waves, these panels cannot be applied to several types of tollgates because of structural limitations. In this situation, it is necessary that the pavement should have a function which restrains reflected radio waves. For these reasons, a radio wave absorption pavement with iron oxide dust, which is added during asphalt mixing was developed. Trials with the absorption pavement are described. For the covering abstract see ITRD E157233

• Authors:
  • HAYASHI, S
  • HIRAI, J
  • TOYOTA, M
  • OOGUSHI, H
  • SAKURAI, J
  • KOBAYASHI, K
• Publication Date: 2008

Language

• English

Media Info

• Pagination: 10p
• Serial:
  • PROCEEDINGS OF THE 4TH EURASPHALT AND EUROBITUME CONGRESS HELD MAY 2008, COPENHAGEN, DENMARK
  • Publisher: EUROPEAN ASPHALT PAVEMENT ASSOCIATION (EAPA)

Subject/Index Terms

• TRT Terms: Absorption; Admixtures; Conferences; Dust; Electricity; Electronics; Iron; Mix design; Pavement design; Radio; Toll collection; Waves
• ITRD Terms: 6758: Absorption; 4736: Admixture; 8525: Conference; 4572: Dust; 6954: Electricity; 6965: Electronics; 7159: Iron; 4714: Mix design; 3055: Pavement design; 6947: Radio; 291: Toll collection; 6767: Wave
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 01336215
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Apr 15 2011 2:50PM