The Department for Transport has pledged £8M to kickstart improvement works to the A45 in the West Midlands.
Transport minister Baroness Kramer announced the funding for a critical bridge in Solihull.
The A45 South Bridge will directly serve Birmingham International Airport, the National Exhibition Centre, Jaguar Land Rover and other businesses in the region.
It will replace the 150-year-old structure that currently carries the westbound carriageway of the A45 over the West Coast Main Line.
The project will create an extra westbound running lane and an improved access slip road to Birmingham International Airport.
Main works are due to start in January, with completion in August 2016. The government will provide up to £8.3M towards the full project cost of £12M.
Kramer said: “The A45 serves important sites including Birmingham International Airport, the NEC, and employers such as Jaguar Land Rover. This new bridge will reduce congestion and improve safety, and include new pedestrian and cyclist facilities.”