The federal government will spend $150 million to upgrade a section of Queensland's Bruce Highway in an attempt to ease congestion.

Prime Minister Malcolm Turnbull visited the Murrumba Downs section of north Brisbane on Tuesday, marking the start of a three-day blitz of marginal Queensland electorates by the prime minister.

The announcement comes after the federal coalition and Queensland's Labor governments have been at odds over funding for several infrastructure projects, most notably Labor's Cross River Rail.

The $150 million will create a new southbound entry and exit with two ramps, allowing easier access to the Bruce Highway that connects to the Sunshine Coast and Redcliffe.