The state government has announced a $15 million injection into the Mitchell Freeway in the hopes funding an additional lane near one of the road's major exits will help ease congestion.

The project will involves widening the northbound lanes from the Hutton Street on-ramp to the Cedric Street off-ramp after figures revealed around 25,000 vehicles use the section every day during afternoon peak - well above capacity.

The Cedric Street off-ramp, which is usually a car park on Thursday nights and weekends.

The project is due to be completed in early 2020 and is expected to create more than 50 jobs.

Transport Minister Rita Saffioti said the upgrade is intended to help address chronic traffic congestion around the Cedric Street area.