1998•16th International Technical Conference on the Enhanced Safety of VehiclesNational Highway Traffic Safety AdministrationTransport CanadaTransport CanadaRequires access

HEADLAMP PERFORMANCE IN TRAFFIC SITUATION

H J Schmidt-Clausen, Thomas Dahlem

Open publisher page 1 citations

Abstract

The photometric requirements of today's headlamps do not relate to the headlights as built into the vehicle, but to the individual headlamp before its installation. The aim of this survey is to demonstrate the relation between technical requirements of individual headlamps and the actual situation on the road. For that purpose headlamps were measured: on the one hand those of known vehicles (reference vehicles) with correctly adjusted and cleaned headlamps; on the other hand headlamps in everyday traffic, i.e. possibly incorrectly adjusted and soiled. It could be shown that the glare of illuminance of the gas discharging headlamps in the measuring point of the human eyes of an on-coming car is lower than that of normal traffic vehicles. For the covering abstract see IRRD E102514.

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What this paper is about

The photometric requirements of today's headlamps do not relate to the headlights as built into the vehicle, but to the individual headlamp before its installation. The aim of this survey is to demonstrate the relation between technical requirements of individual headlamps and the actual situation on the road. For that purpose headlamps were measured: on the one hand those of known vehicles (reference vehicles) with correctly adjusted and cleaned headlamps; on the other hand headlamps in everyday traffic, i.e. possibly incorrectly adjusted and soiled. It could be shown that the glare of illuminance of the gas discharging headlamps in the measuring point of the human eyes of an on-coming car is lower than that of normal traffic vehicles. For the covering abstract see IRRD E102514.

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Available abstract

The photometric requirements of today's headlamps do not relate to the headlights as built into the vehicle, but to the individual headlamp before its installation. The aim of this survey is to demonstrate the relation between technical requirements of individual headlamps and the actual situation on the road. For that purpose headlamps were measured: on the one hand those of known vehicles (reference vehicles) with correctly adjusted and cleaned headlamps; on the other hand headlamps in everyday traffic, i.e. possibly incorrectly adjusted and soiled. It could be shown that the glare of illuminance of the gas discharging headlamps in the measuring point of the human eyes of an on-coming car is lower than that of normal traffic vehicles. For the covering abstract see IRRD E102514.

Key concepts: Headlamp, GLARE, Illuminance, Luminance, Computer science, Carriageway, Automotive engineering, Engineering

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