Browse Publications Technical Papers 1999-01-1211

Measurement of Retroreflection from Road Surfaces and Lane Markings 1999-01-1211

While driving his motor vehicle, the driver constantly looks at the lane marking to help with his or her coursing. The conspicuity of lane markings depends greatly on its retroreflection and that of the surrounding road surface area.
In this study, we measured in a darkroom the retroreflection performances of two types of pavement surfaces and also two types of lane marking, all of which are types currently in practical use. The following conclusions were reached as a result:
  1. 1.
    The reflection characteristics of lane marking
  • Compared to conventional type lane marking, high-luminance type lane marking exhibits a reflection characteristic that is approximately 3 and 5 times greater under dry and wet road conditions, respectively.
  1. 2.
    The reflection characteristics of road surfaces
  • From the initial time of paving, the luminance factor of a dense asphalt road surface rises roughly 5-to 6-folds with the passage of time. Thus, the whiteness of road surfaces increases with time.
  • The luminance factor of dense asphalt road surface that has been in use for a certain length of time drops to about a one-fourth level, when the road condition changes from dry to wet.
  1. 3.
    The contrast of luminance between road surface and lane marking
  • This contrast is far greater when (a) a high-luminance type lane marking and gas discharge headlamps are combined that when (b) a conventional type lane marking and halogen headlamps are coupled. The contrast is approximately 3 and 5 times greater under dry and weet road conditions, respectively, in favor of (a) over (b).


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Front Fog Lamp Performance


View Details


The “Night View System” Using Near-Infrared Light


View Details


Comparison of Eye Fixations of Operators of Motorcycles and Automobiles


View Details