New Mario M. Cuomo Bridge: Details Released On Friday's Traffic Shift From Old Bridge

TARRYTOWN, NY — Get ready to motor across as least part of the new Governor Mario M. Cuomo Bridge. The state Thruway Authority has released details of the shift of Rockland-bound traffic from the Tappan Zee Bridge to the new bridge Friday night, that is, if the weather permits. Be warned: there will be multiple lane closures and brief traffic stops in order for crews to reconfigure the landings and stripe the lanes.

Basically, the Thruway Authority is opening one of two new spans, both located north of the TZB, with a temporary traffic pattern of four lanes in the Rockland-bound direction. It will not be until the fall that the Westchester-bound traffic will be shifted from the old bridge to the first span. (For more information on this and other neighborhood stories, subscribe to Patch to receive daily newsletters and breaking news alerts.)

Traffic will consist of four lanes in each direction. A concrete barrier will separate the traffic, allowing for construction of the second span to be completed.

At first, only four northbound/westbound lanes will open to traffic to allow Tappan Zee Constructors to safely work in the Rockland and Westchester landing areas.

In the fall, four southbound/eastbound lanes will be shifted onto the new bridge.

That will allow TZC to demolish the landings of the old bridge, which occupy the same footprint of the second span, and connect the second span to land.

Beginning Saturday morning, southbound/eastbound traffic will use four lanes on the old bridge. A moveable concrete barrier and/or orange construction barrels will separate traffic from three retired lanes, which will be used as a construction work zone.

Since the new bridge, specifically its landing areas, will remain a active construction site, the posted speed limit will be 45 mph.

Here are the details about Friday night’s traffic shift — the rain date is Saturday, Aug. 26 — from the state Thruway Authority:

Multiple lane closures will begin sometime after 9 p.m. Friday. At least one Rockland-bound lane will remain open except when State Police stop and hold traffic early Saturday morning.

The northbound/westbound Thruway exit 9 (Tarrytown – Sleepy Hollow – US Route 9) on-ramp from Route 119 will be closed at approximately 9 p.m. Drivers will be detoured approximately one mile east on Route 119 to access the northbound Thruway (see map below). The on-ramp is scheduled to reopen by 6 a.m. Saturday. The exit 9 off-ramp to Route 119 will remain accessible from the northbound Thruway.

The operation will also necessitate closing the southbound Exit 10 (Nyack – South Nyack – US Route 9W) off-ramp at approximately 9 p.m. The off-ramp is scheduled to reopen by 6 a.m. Saturday. The detour route is detailed in the map below.

Between midnight and 5 a.m. Saturday, there will be two traffic stops, each lasting up to 20 minutes, of all four lanes of the northbound/westbound Thruway. The traffic stops will allow Thruway Authority and Tappan Zee Constructors workers to stage operations, stripe lanes at both ends of the bridge and shift barriers and equipment. To ensure the public’s safety, State Police will stop and hold all traffic. The first traffic stop will take place near Exit 9 in Tarrytown. A second traffic stop will occur a few hours later near Exit 10 in South Nyack.

Four northbound/westbound lanes on the new bridge and four southbound/eastbound lanes on the old bridge are scheduled to be open to traffic no later than 8 a.m. Saturday.

Variable Message Signs along the Thruway and other highways in the region have been activated to inform motorists of the traffic shift. Motorists are encouraged to tune to Thruway Highway Advisory Radio for updates.

After all traffic has been shifted onto the new bridge in the fall, this traffic pattern will remain in effect until the second span is complete in 2018. At that time, motorists will experience the full benefits of the twin-span crossing with its 12-foot wide driving lanes, the addition of safety shoulders and lanes for emergency vehicles. Construction of a bicycle and walking path with six unique viewing areas will begin on the westbound span after eastbound traffic has been transferred to the eastbound span.

Under the leadership of Gov. Andrew M. Cuomo, Thruway tolls, including those on the new bridge, are frozen at their current levels until at least 2020.

Approximately 50 million vehicles crossed the Tappan Zee Bridge in 2016.

Main photo and graphics: NYS Thruway Authority.