There will be a complete closure in both directions of the Mercier Bridge overnight tomorrow. It begins at 11 pm Friday until 5 am on Saturday. The ramp from Highway 20 West to the 138 to the Mercier Bridge will close at 5 a.m. Saturday and reopen at 5 a.m. Monday. The 138 ramp to Highway 20 East will be closed from 4 a.m. Saturday until 5 a.m. Monday. Also: Heading downtown will also be difficult this weekend. The ramp from Decarie south to the 136 east will close just before midnight Friday and reopen at 5 a.m. Monday. The ramp from Highway 20 East to the 136 will be closed at the same time.