The circular roadway will be closed from 10:30 p.m. to 5 a.m. on weekdays for over a year.
The tunnel will remain open and accessible during the overnight work. However, motorists will need to use local roads to enter the tube. Rush-hour commuters will be able to follow their normal routes.
Right now, officials are trying to get the word out to drivers.
The $88 million project calls for repaving the road, rehabilitating the concrete deck and fixing the deteriorating steel that underpins the elevated roadway.
An estimated 92 million people pass into New York City through the tunnel each year, mostly in commuter buses.
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