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Volume 958: debated on Tuesday 14 November 1978

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asked the Secretary of State for Scotland how many miles of motorway there are now in Scotland; and what proportion of this mileage has overhead lighting.

119 miles of trunk road motorway and nine miles of local authority urban motorway. All nine miles of urban motorway and four miles—exclusive of lighted interchanges—of trunk road motorway are lighted.

asked the Secretary of State for Scotland what work his Depart- ment has carried out into the effect on drivers of moving from a lit section of motorway to an unlit section of motorway during the hours of darkness.

Analyses are made of incidents which happen on trunk and special roads during hours of darkness to assess whether remedial measures including lighting are practicable or required.

asked the Secretary of State for Scotland what criteria govern his decision on whether or not to install lighting on motorways in Scotland.

Those used generally throughout Great Britain. I am sending the hon. Member an extract from the highways manual in use.