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To ask the Secretary of State for Transport whether he has made an assessment of the potential (a) financial and (b) carbon savings of (i) a reduction in the density of lighting on main road and motorway routes and (ii) switching off lighting on sections of main road and motorway routes where there is a good safety record and traffic flows during the night are low.
The Highways Agency has no plans to reduce the density of lighting (such as turning off every other lamp) on all purpose trunk roads (main roads) or motorways as this can cause patchy lighting and could compromise safety. This can be tiring for motorists and may conceal hazards in the darker patches.
The agency has assessed and implemented switching lighting off between midnight and 5.00am on motorways where there is a good safety record and traffic flows during the night are low. This is delivering up to 40% savings in energy costs and carbon at these locations.
There are no plans to switch off lighting during parts of the night on all purpose trunk roads.