Silver Line - SL1 & SL3 detoured overnight on Wednesday, May 15th, and 5 AM Thursday, May 16th, from 10 PM to 5 AM, due to construction. Inbound service will be diverted to the Sumner Tunnel due to I-90 West Exit 135 closure . Starts May 16 Until May 17 Passengers can board at an additional stop at Summer St @ South Station (Red Line entrance).