Details of an inquiry to investigate congestion on the A12 in Essex have been released by the county council.
Sir David Rowlands is to head the inquiry into the A12
The inquiry is to be led by Sir David Rowlands, a former Permanent Secretary at the Department of Transport.
The council estimates traffic problems on the A12 cost the region about £250m a year, and expansion in the county increases pressure on the road.
It is believed to be the first inquiry of its kind to be commissioned by a local authority in the UK.
Sir David Rowlands said: "As someone who lives in Essex myself and the uses the A12, I understand the issues confronting motorists and rail users very well."
Over the last year there have been a number of accidents that have caused gridlock on the A12 and also affected the main railway line to London Liverpool Street.
Full details of the inquiry are set to be revealed next month.