Granite Construction has won a $209m contract for modification of the 59/20 interchange in Alabama, US.

The scope of the contract, awarded by the Alabama Department of Transportation, will include the construction of the interchange at I-59/20 and I-65 on the northwest side of the Central Business District in Birmingham.

In addition, work will involve the construction of new direct connector bridges to downtown, widening of existing bridges, replacement of crossover bridges, and upgrades to main lane pavement.

Construction on the project is expected to commence in early 2016, and will be completed by the end of 2018.