Having used one of these roads I can vouch that the alternative is very effective.
We light up probably thousands of miles of motorway, trunk roads and rural roads. Switching off these lights could have an enormous effect on running costs, CO2 emissions and reduce the need for new power generation.
If, for example, one of the requirements is to provide illumination during periods of mist or fog then this could be limited to those periods when this requirement must be met – perhaps even operated by the police or Highways Agency traffic officers using a simple remote control.
With all of our thoughts being directed to global warming and climate change, there must be an imperative to look into such matters. The benefits to accrue could be enormous.
JOHN ROLFE-DICKINSON, firstname.lastname@example.org