Transurban Queensland's $512 million and two-year Logan enhancement project has fixed the bottleneck where the Logan Motorway connects with Beaudesert Road and the Mount Lindesay Highway, says the Queensland government.
The upgrade also improves the Wembley Road interchange with a four-lane bridge over the motorway, a better interchange with the Gateway Motorway and new on and off ramps for the Gateway Motorway at Compton Road.
Premier Annastacia Palaszczuk said the project provided 1300 jobs and would mean quicker trips and fewer traffic jams.
"We know Queenslanders want to spend less time in traffic and more time at home with their families and friends, and that's what projects like this do," Ms Palaszczuk said.
"This extra bridge at Wembley Road will fix the notorious jams and cut travel times for locals crossing the motorway between Browns Plains and Logan Central.
"This upgrade is also about improving freight productivity and supporting local businesses and jobs."
Transport Minister Mark Bailey said the project provided 15km of new lanes, unlocked some of the south east's busiest motorway interchanges and provided new connections to the Gateway Motorway at Compton Road.
"More than 170,000 motorists use the Logan and Gateway Extension Motorways every day," Mr Bailey said.
"Communities further up the Mount Lindesay Highway like Flagstone and Yarrabilba are growing, so it's important that these important connection points across the motorway meet that growing local demand.
"A new 2km bike and pedestrian path has also been built as part of the project, which links Beaudesert Road to Mount Lindesay Highway via the Logan Motorway - it will open to the community in the coming days.
"This project is just one of a series of major southside highway upgrades people will see completed in the next couple of years to tackle congestion.
"The M1/M3 upgrade, works between Rocklea and Darra on the Ipswich Motorway and safety improvements on the Mount Lindesay Highway are all underway now as part of our record $23 billion, four-year infrastructure investment for Queensland."
State Development Minister Cameron Dick said the project had seen the area boom, with major commercial and property developments being approved or delivered.
Transurban Queensland group executive Sue Johnson said the upgrade had made it a quicker, safer choice for motorists.
"Thanks to the project, motorists are getting 20 minutes back in their day by taking the Logan Motorway," Ms Johnson said.
"With roadworks now complete, speed limits are back to 100km/hr."
A new 2km bike and pedestrian path has also been built as part of the project, which links Beaudesert Road to Mount Lindesay Highway via the Logan Motorway.
Queensland Trucking Association chief executive Gary Mahon said the increase in tolls had been accepted by the heavy vehicle industry in return for time saving benefits.
"Those are the kind of benefits we want to see, because that helps our industry save on fuel costs, bring more certainty to trip times and supports more efficient freight movement."
