The lanes, which were part of the $1.1 billion Gateway Upgrade North project, stretched northbound between Southern Cross Way and Depot Road, Deagon and southbound between the Sandgate Road bridges and Nudgee.
RACQ spokesperson Lucinda Ross said the northern section of the Gateway Motorway was a current bottleneck and motorists had finally been rewarded for their patience over the construction period.
“This stretch of road has been a frustration for over a decade – especially on Friday afternoons when they’re trying to head away for the weekend, when there’s events at the Entertainment Centre and as we approach the holiday season,” Ms Ross said.
“The Gateway Motorway is also used by freight, tourist and general traffic heading to the Port of Brisbane and Brisbane airport.
“The additional lanes and improved design will greatly improve safety as well as reduce congestion and delays for motorists – and the shared pedestrian and cycle path is a great addition for locals in the area.”
Ms Ross said motorists should remember a reduced speed limit would be in effect while final works were completed into the new year.