Key findings of this research are as follows: No technology exists that can fully automate high occupancy vehicle (HOV) occupancy enforcement, because no technology exists that can see through metal vehicles and pick out the people inside; Of the factors that limit the ability to see inside a vehicle, the most pernicious is window tinting, because of the threat it poses to law enforcement (opaque auto glass tinting can hide not only a weapon, but also the person reaching for it); Adequate enforcement requires extensive space in the median and in many instances it is not feasible to provide this space; and Current statutes that require officers to have vehicles to pull over to the right are inappropriate for HOV enforcement. Key recommendations are as follows: Where feasible to do so, highway design should allow for sheltered observation areas and wide, long citation areas, with adequate entrances and exits, in the median next to the HOV lane; An optics expert should review Arizona's law regulating auto glass tinting, to see if current restrictions allow for adequate video imaging; Prominently post the fine for HOV violations on roadside signs; Randomly, but periodically, utilize special enforcement followed by routine enforcement; Evaluate increased penalties for HOV violations; Have engineers meet with highway patrol officers before design concepts are finalized; Consider implementing high occupancy toll (HOT) lanes on HOV lanes by charging full price for single occupancy vehicles (SOVs), half price for HOVs with two or more occupants and nothing for HOVs with three or more occupants; Monitor new technology as it emerges and reconsider implementing it if it appears feasible and warranted; Evaluate establishing enforcement areas near HOV entry and exit ramps; and Consider installing a "hot line" for citizens to call to report HOV violators.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Photos; Tables;
  • Pagination: 98 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00987648
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-AZ-04-552,, Final Report
  • Contract Numbers: SPR-PL-1-(61)552
  • Created Date: Mar 8 2005 12:00AM