Predicting target detection distance with headlights. Paper prepared for the 55th Annual Meeting of the Transportation Research Board TRB, Washington, D.C., January 1976.

An instrumented vehicle was used to measure detection distances of 12 subjects under different target-background-glare conditions. The subject testing was followed with extensive photometry to the measure the target, background and veiling brightness of each target condition. The reflectance properties of pavement and road shoulder were also mapped in detail. The necessary contrast multipliers needed to account for factors such as complexity of road surface delineation, transient adaptation, etc., are also discussed