The Montreal Jazz Fest kicks off Tuesday night with a giant free concert featuring Stevie Wonder at the new plaza across from Place des Arts. The concert, which starts at 9:30 p.m. with opening acts, is expected to run pretty late into the night, and the STM has decided to extend service on the green, orange and yellow metro lines by a half hour to accomodate traffic (in addition to adding more trains during the evening).

Final departures on the orange and green lines will be 1:05am instead of 12:35am, and final departures on the yellow line will be at 1:20am instead of 12:50am.

For those who haven’t taken the last metro before, the last trains of the orange and green lines wait for each other at Berri-UQAM and Lionel-Groulx to make sure people transferring don’t get stranded. The trains are scheduled so the last ones depart in all four directions from Berri-UQAM at 1:30am.

For those of you going to the concert, you’ll want to be on the platform at Place des Arts at 1:15am if you’re heading east, 1:25am if you’re heading west. If you’re taking the yellow line, try being there no later than 1am.

The STM also announced Monday a bunch of other stuff they’re doing with summer festivals, although most of it is in the form of cross-promotional discounts or free shuttles.