NEW YORK (CBSNewYork) – The long-anticipated L train service changes will take effect tonight.

The L will run less frequently on nights and weekends to allow for repairs to an East River tunnel damaged during Superstorm Sandy.

The MTA is adding extra M, G, 7 and bus service to give riders more options. There will also be two special Williamsburg Link bus routes.

The service changes are expected to last roughly 15 months.

Meanwhile, the city has unveiled a new traffic strategy for 14th Street, including two lanes in each direction, with center lanes reserved for buses, trucks and emergency vehicles.

Those changes are set to start later this spring.

For the latest on the L train project, click here.