Mainline Improvements Begin Next Week Overnight Lane Closures On New York State Thruway (I-87/I-287)
Press Release August 9, 2019 No Comments

Mainline Improvements Begin Next Week Overnight Lane Closures On New York State Thruway (I-87/I-287)

August 9, 2019

Tappan Zee Constructors, LLC (TZC) is scheduled to continue realigning lane control signage on New York State Thruway (I-87/I-287) traffic lanes on the Governor Mario M. Cuomo Bridge this week, requiring overnight lane closures tonight on the bridge. TZC is also scheduled to begin mainline improvements near the bridge next week. The work will require multiple overnight lane closures in Tarrytown.

The installation of an overhead gantry near exit 9 in Tarrytown will require overnight lane closures on the northbound Thruway during the overnight of Monday, August 12. At least one northbound lane will remain open during the overnight of Monday, August 12, except during three temporary traffic holds near exit 9 (Tarrytown – Sleepy Hollow – US Route 9), beginning at midnight. Each traffic hold is anticipated to last approximately 15 to 30 minutes, allowing TZC to install the overhead gantry and move equipment.

Additional 15-minute traffic holds near exit 9 are scheduled to occur next week during early morning hours, allowing TZC to move equipment for mainline improvement operations.

Specific lane closure times are listed in the chart below.


Fri. 8/9 10 p.m. – Two left lanes
11:59 p.m. – Three left lanes
6 a.m., Sat. 8/10 Northbound (I-87/I-287)
from exit 9 to exit 10
Mon. 8/12 9 p.m. – Two left lanes 7 a.m., Tues. 8/13 Northbound
near exit 9
Tues. 8/13 8 p.m. – Two left lanes
11 p.m. – Three left lanes
5 a.m., Wed. 8/14 Southbound
near exit 9
Wed. 8/14 8 p.m. – Two left lanes
11 p.m. – Three left lanes
5 a.m., Thur. 8/15 Southbound
near exit 9
Thur. 8/15 10 p.m. – Two left lanes
11:59 p.m. – Three left lanes
7 a.m., Fri. 8/16 Northbound
near exit 9
Fri. 8/16 10 p.m. – Two left lanes
11:59 p.m. – Three left lanes
8 a.m., Sat. 8/17 Northbound
near exit 9

Bicycle/Pedestrian Path
Construction of the shared bicycle and pedestrian path continues.

On the bridge, TZC will continue to work on the northern side of the westbound span for the path’s overlooks and fencing.

At the Westchester Landing, construction continues at the terminus site walls, storage building and visitor pavilion. Operations include installing electrical wiring, concrete masonry units, granite walls, rebar, and pouring concrete.

At the Rockland Landing, work to install a traffic signal at the intersection of Clinton Avenue and South Franklin Street is scheduled to continue for several weeks.

Additional work includes:

  • Barrier and fencing installation near bridge landings
  • Area preparation at the New York State Thruway Maintenance and New York State Police facilities
  • Dismantling of the old bridge’s foundations, weather permitting

Boater Safety
Partial closures of the main navigation channel may be necessary, as TZC continues to dismantle the Tappan Zee Bridge’s foundations.

All vessels should avoid the perimeter of all buoys and stay within the navigation channel as demolition operations continue this coming week.

Cranes, barges and other equipment may occupy parts of the channel during this time. Boaters are strongly encouraged to avoid the project site during the closures and to avoid the Regulated Navigation Areas, located east and west of the main channel.

Times and dates of the potential, partial closures are subject to change and will appear in the U.S. Coast Guard’s weekly Notice to Mariners; on the project’s Twitter feed (@NewNYBridge); and broadcast on Marine Radio Channel 22A. Tappan Zee Constructors can be contacted via Marine Radio Channel 16 for assistance.

Rockland and Westchester marine units continue to patrol the project site.

More boater safety information, including the U.S. Coast Guard Notice to Mariners, a construction site map and GPS-tracked construction vessel locations, can be found at

The New York State Thruway Authority provides this information as a public service. Any reliance you place on such information is therefore strictly at your own risk. Nothing in these guidelines shall supersede the actual construction conditions, and regulations set forth by the U.S. Coast Guard.

All lane closures are subject to change due to traffic, weather or emergency situations. Please visit for real-time information regarding traffic conditions.