Wall lining and luminance tests

摘要

Lighting design for transport tunnels is defined in Australian standard AS1158.5 (2007) 'Lighting for Roads and Public Spaces Part Five: Tunnels and Underpasses', and also in European standard CIE 088:2004 'Guide for the Lighting of Road Tunnels and Underpasses'. In these standards the nature and quality of the interior wall linings is described. In AS1158.5, section E4.4 dictates that surfaces other than the carriageway in the tunnel lighting model shall be perfectly diffusing (i.e. lambertian), while the European standard CIE88 does not specify a surface reflective quality. It can be seen from the case history tabled herein, that the nature of tunnel wall linings is not accurately understood and that the potential for reflected glare from vehicle headlamps is affected by the overall performance of the interior reflectance inside the tunnel.