The operator stayed on the phone with the man to reassure him until a patrol located his car - and drove the vehicle through the tunnel with him as a passenger, before sending him on his way. He was too scared to drive through the Dartford crossing.
Inspector Paul Sellwood, of the Kent Police roads policing unit, said: "This incident shows how seriously we take all calls we receive from members of the public."
More top news
Monday afternoon's weather for the west of the region
Monday afternoon's weather for the east of the region
Top Gear favourite The Stig headed out on the road at a slower pace as a giant figure of the show's test driver headed across on a truck.