4-60: Road Traffic Lights – Photometric Properties of Roundel Signals

To revise the international standard ISO 16508:1999/CIE S 006. To specify requirements to colour, luminous intensity and luminous intensity distribution of 200 mm and 300 mm road traffic signals incorporating the newest LED technology in light signals. To deal specifically with impacts on signal recognition due to the sun including sun phantom and ghosting. To provide test method for determining phantom light luminance ratio.

Chair: Ron Gibbons (US)