Assessment of Glare Caused by High Consumption Cars Headlights in Iran

road accidents and their casualties are considerably high. In addition, the headlights of cars, especially on two-way roads, leads to glare in the eyes of oncoming drivers. The purpose of this study was to determine the level of discomfort glare of car headlights and the effects of some variables on creating discomfort glare.

The illuminance of the driverchr(chr('39')39chr('39'))s eye was measured using luxmeter and the discomfort glare caused by the carchr(chr('39')39chr('39'))s headlights was determined using the Schmidt-Clausen and Bindels model and with considering the lateral and longitudinal distance between the two vehicles and the background luminance of the road surface were determined.

In cars, in low beam mode, from 100 meters to 50 meters, the luxmeter fails to record any illuminance. In the high beam mode, discomfort glare gradually increased from the distance of 100 meters by reducing the longitudinal distance between two vehicles. Increasing on the level of discomfort glare for Samand up to 30 meters, Pride Saba GTX up to 20 meters, Pride 131SL, Renault Megan and Peugeot Pars up to 10 meters and the Peugeot 405 depending on the background luminance up to 10 and 20 meters continued. The level of annoying dulling was reduced and from that interval onwards, the level of discomfort glare reduced.

The side distance between vehicles, headlights aiming, voltage and the type of headlightchr(chr('39')39chr('39'))s lamp are affecting in the discomfort glare which can be reduced by changes in road design and vehicle headlights.