London Police say the Guy Lombardo Bridge will be closed to traffic overnight, and for most of Friday, as city engineers investigate a possible 'structural' issue.

The bridge between Springbank Drive and Riverside Drive was initially shut down around 5:30 p.m.  Police and the fire department were called to investigate complaints that the bridge deck appeared to be uneven.

"Pretty much felt like a bunch of people pushing up and down on my car," said Eric, who was driving northbound on the bridge.

"The bridge was rippling about six to 12 inches.  It felt like a large, large earthquake.  Luckily traffic was able to get moving and my first thought was to call 911," he added.

The bridge will remain closed until at least sometime after the Friday morning commute, and "probably the Friday evening commute," city officials told AM980.

"There was some unusual movements felt with respect to the bridge," said City Engineer John Braam early Thursday evening.

"As a result, we've taken the cautionary approach of actually closing the traffic and asking that it continue to be closed until at least tomorrow, where we will have the opportunity to fully inspect it to determine whether or not it there is anything physical or otherwise that may have shown-up." he said.

Approximately 37,500 vehicles use the bridge every day.

"I would only assume it'd be a hectic morning drive and hopefully people can leave earlier and employers are understanding that people will be late for work because of this...schools." said London Police Sgt. Gary Bezaire.

Police remind drivers not go around the barriers set-up in place as it puts not only your safety in jeopardy, but also that of the officers on scene.

In a news release issued Thursday evening, the LTC says the closure of the bridge will have one of its major routes on detour.

10 Wonderland is on the following detour in both directions. Heading southbound it will turn west onto to Riverside, left on Boler, left on Commissioners to Springbank and back to its regular route. Northbound it turns left on Springbank to Commissioners, right on Boler, right on Riverside and then left back onto Wonderland to its regular route.

The closure of the bridge is expected to cause considerable schedule delays and extended travel time on the 10 Wonderland route, as well as the 14 Highbury route which is interlined with it. Other routes may also be impacted as drivers find alternate routes causing increased congestion.

It's one of the LTC's busiest corridors with an estimated 300 passengers an hour during peak times.

Stay with AM980.ca or www.twitter.com/AM980News for updates through out the night, and don't forget to listen to AM980's Non-Stop News beginning at 5:30 a.m. Friday for the very latest.