Toronto's construction season is officially here, and with it comes new headaches for transit users on some of the city's busiest streetcar routes. 

On Sunday, a major rehabilitation project will get underway at the intersection of King Street E. and Church Street. The city will be tearing up the road and sidewalks to replace aging watermains, and the TTC will use that opportunity to do upgrades to streetcar tracks and other critical infrastructure.

The work is expected to last until early Septem…