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(b)
(c)
whether the existing lighting systems in various road tunnels have posed any safety problems to motorists; and
of the number of traffic accidents occurring in the road tunnels in the past three years which were caused by the design of the lighting systems concerned?
Reply:
Mr President,
(a)
(b)
(c)
Standards on the lighting systems in road tunnels are set out in the Public Lighting Design Manual of the Highways Department, and the Transport Planning and Design Manual of the Transport Department to provide guidance to those involved in the planning and design of transport infrastructure of Hong Kong. They specify the design standards, daytime and night time lighting requirements including lighting intensity, luminance of the walls, glare control and avoidance of flicker, emergency lighting, lighting for bi-directional traffic, power supply and other technical controls etc. The lighting systems in all road tunnels in Hong Kong have been designed and installed according to these standards.
The performance of the lighting systems in all tunnels is regularly monitored by the Transport Department and the Electrical and Mechanical Services Department. There is no indication that the existing lighting systems in road tunnels have posed safety problems to motorists.
In the past three years, there were no tunnel traffic accidents which were caused by the design of the tunnel lighting systems.
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