M6 lighting between junctions 15 to 16 is switched off
Lighting along part of the M6 in Staffordshire is being permanently switched off because it is "no longer justified", the Highways Agency said.
From 11:59 BST, the lights between junctions 15 and 16 near Stoke-on-Trent will be turned off to reduce carbon emissions by 148 tonnes each year.
The agency expects its energy bill to be reduced by about £46,000 too.
A spokesman for the organisation said they had evidence that the move would not have "an impact on safety".