As if the Don Valley Parkway wasn't bad enough, the 15km expressway is about to embark on some heavy summer construction starting on Tuesday.

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Following the long weekend, the city will commence rehabilitation work on four bridges over the DVP. Construction is scheduled to run until October 2019.

In an effort to reduce the impact on commuters, most of the work will be done overnight, however, lane and ramp closures are still expected to cause traffic and delays.

The bridges being worked on include Don Mills, Spanbridge, Wynford and Lawrence.

According to the City of Toronto website, the most extensive work will revolve around Don Mills Road bridge. The other three bridges are being added to the project to reduce the number of closures needed in the future.

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Though the actual road work won't commence until 12 a.m. on July 2, set up will begin at 10 p.m. on July 1. During that time, the southbound DVP at Lawrence Ave. E. and Don Mills Rd. will be reduced to one lane, while Spanbridge Rd. and Wynford Dr. will be reduced to two lanes for set up.

Just in time for commuter chaos to begin on Tuesday morning, two lanes will open up in each direction. These lanes are expected to remain open 24 hours a day, seven days a week until the first stage of the project is complete in late August.

The project is outlined as follows: