Subway riders may need to plan alternative routes as the Metropolitan Transportation Authority works on 14 different lines this weekend.

Some of the most significant service changes are on the 3, 4, and 7 lines.

There are no 3 trains running between Franklin Avenue and New Lots Avenue until 5 a.m. Monday.

There is no 4 train service between Atlantic Avenue-Barclays Center and New Lots Avenue until 5 a.m. on Monday.

There are also no 7 trains running between Times Square-42nd Street and Queensboro Plaza until 5 a.m. Monday.

For a list of all service changes this weekend, and information on planning alternate routes, log on to mta.info.