The emergency lane in the Trayanovi Vrata tunnel on the Trakia motorway towards Burgas is closed until 4pm today, the Road Infrastructure Agency said.
Workers are cleaning and washing the marker posts in the tunnel. The agency asked drivers to take care and keep their speed in line with road conditions.
A few days ago, a lorry overturned at the same tunnel, in the lane towards Burgas. The driver was taken to hospital for a check-up.