ISO/TC 22/SC 35/WG 1 - Lighting and light-signalling

ISO 4148:2004 specifies the dimensions of special warning lamps for road vehicles, in order to ensure interchangeability and accurate positioning, bearing in mind the rapid change of light intensity from such devices in a vertical cross-section of the projected beam. It also specifies methods for testing magnetic-base-mountings used to install special warning lamps directly on the steel sheet of the roof or body of a vehicle.

Specifies the dimensional, mechanical and optical quality criteria for equipment to measure or to verify the orientation of the luminous beams emitted by the headlamps installed on road motor vehicles excluding mopeds and motorcycles. The equipment also allows evaluation of the quality of the luminous beams by visual means. Lays down the requirements for the floor on which the vehicles are placed, the vehicle preparation, equipment using a distant screen, optical equipment with installation and operating instructions, photometric devices.

Presents a compilation of legal specifications of the United Nation Conference of Road Traffic, North America, Europe, Australia and Japan and shall be used when the lighting and light signalling devices of ISO 303 are designed and installed into the various road vehicles. Furthermore, the document gives the main difference between the listed requirements as well as specific national regulations and should be used for further harmonization.

Establishes a comparison of regulations on the requirements for devices to be installed into road vehicles and their trailers. May be applied in the lack of detailed specifications.

Specifies the provisions applicable to registration plates. Compliance with national regulations for dimensions, shape, letters, and numerals shall be checked on a completely finished plate by the competent authorities. Includes photometric and colorimetric properties by day and night. Describes sampling and various tests.

Defines the acceptable quality levels for each characteristic checked when samples of flashers for power-driven vehicles (with the exception of motorcycles) are taken at random. Does not specify the frequency of sampling, nor the batch size. Applies to flasher types which have been tested and approved in accordance with ISO 4082.

Defines the electrical characteristics with which flasher units shall comply when submitted for acceptance. Applies to flashers intended for use on motor vehicles with 12 V or 24 V systems, which may or may not be equipped for a towed vehicle. Can be applied to motorcycles. Not applicable to two-level luminous intensity devices.