The order for the illuminated signs on the Trakia motorway was signed last year, and the signs have been delivered but not yet installed, said Daniel Mitov, a GERB-SDS MP and former interior minister.

He said last year's figures showed the lowest number of road deaths. When a stretch of road is dangerous, police put out cars with warning lights and delineator posts, Mitov said.

"Those in power should not refer to the legacy," he added.