The patent specification relates to vehicle interval detection and signalling systems intended to prevent drivers from travelling too close to the vehicle ahead. The equipment described is said to provide a relatively simple system for sensing potentially unsafe traffic conditions caused by vehicles following one another too closely. The equipment also provides for warning the offending motorist or recording and indicating violations of traffic law. Details are given of apparatus circuit design and method of highway operation. /TRRL/

  • Corporate Authors:

    Patent Office, England

    25 Southampton Buildings
    London,   England 
  • Authors:
    • Marshall, A N
  • Publication Date: 1974

Media Info

  • Features: Figures;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00179948
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Patent Spec. 1348895
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM