It's another week of lane closures as construction on the new Tappan Zee Bridge continues.

As work on the $3.9 billion bridge project continues, it will have an impact on the existing bridge this week.

On the Westchester side, crews are doing overnight work that will require the closing of various toll plaza lanes on the southbound side of the bridge. Different lanes will be affected during the work, which takes place from 9 p.m. until 4:30 a.m. The crews are preparing the area for underground utility cables and piping that will be part of the new bridge.

Over on the Rockland side, a project to install big steel sheets that will support the existing roadway during the construction process is beginning. Crews will use a crane with a vibrating pile hammer to install the sheets, and it will be positioned behind a temporary concrete barrier in South Nyack.

There are other lane closures this week that commuters should know about on the New York State Thruway. The northbound right lane near exit 10 is closed from 10 a.m. to 3 p.m. every day this week.

Also, an interactive GPS map is now up on the project website showing where work is being done and barge locations, so boaters can navigate safely through the busy area.