DETECTABILITY OF PAVEMENT MARKINGS UNDER STATIONARY AND DYNAMIC CONDITIONS AS A FUNCTION OF RETROREFLECTIVE BRIGHTNESS

With the availability of pavement marking systems having varying reflective performance, the brightness a road surface marking must have to provide safe and effective guidance has remained undefined. This work studied minimum reflective brightness needed for a pavement marking to be visible to a driver as a function of distance of the marking from a vehicle. Six pavement marking products having a wide range of retroreflective brightness performance were viewed as isolated center skip lines from stationary vehicles at distances from 30 to 250 m in a dark rural setting. Product detectability for each viewer/marking combination was determined. Also, seven pavement marking products were viewed from moving vehicles with a driver approach speed of 24 kph. Detection distances for each driver/marking combination were determined. Retroreflective brightness of the products as a function of distance was measured at geometries corresponding to the vehicle-driver distances of the experiment. Detectability of pavement markings depends on the viewing conditions. A correlation could be seen between detectability of pavement markings and product brightness and viewing distance. The nature of this correlation was different when the experiment was changed from a stationary viewing to one with a moving vehicle with shorter detectability distances for the same marking in a moving vehicle.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 68-76
  • Monograph Title: Traffic control devices, visibility, and railroad grade crossings
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00714882
  • Record Type: Publication
  • ISBN: 0309061601
  • Files: TRIS, TRB
  • Created Date: Dec 12 1995 12:00AM