Thunder Bay drivers take a William Street detour to avoid construction on Golf Links Road. (Jeff Walters/CBC)

A big road construction project in Thunder Bay has caused some congestion — and some headaches — for motorists.

The four-laning of Golf Links Road is impacting William Street in particular.

Thunder Bay's manager of engineering said they’ve had to make "some adjustments to the traffic signals at Balmoral and William and Balmoral and the Harbour" after seeing vehicles backed up at different locations.

Pat Mauro said the city lengthened the duration of the green light at these two key intersections.

The city will continue to monitor traffic flows along alternate routes and make more adjustments as needed, he said, adding that improving Thunder Bay's roads requires some inconvenience

"We've gotta build it, so we've gotta get used to it for the next four to five months anyway," he said. "I think people are adjusting to the detour and probably using other routes."

The construction on Golf Links is phase one of a major expansion of the road, and more construction will come as four-laning is extended up to Red River Road in the next few years.

When the project is completely finished, there will be four-lane roads from Arthur and Edward Streets to River and Cumberland Streets.