uberxUberX drivers in New York City may want to affix a “Baby On Board” bumper sticker to the back of their vehicles.

That’s because Uber today announced a new pilot service called UberFAMILY that gives people the option to hitch a ride with UberX cars that have a car seat.

News of this program leaked last week on VentureBeat, but now Uber is officially launching the service.

“With uberFAMILY, parents on-the-go now have access to a reliable, safe and affordable transportation option,” the company said, adding that only its “highest-ranked” UberX drivers will be offering the car seat feature.

Passengers in New York City will need to tap the person icon in the top left corner of the Uber app and enter the code “FAMILY,” to unlock the uberFAMILY view. Once they jump into a car and strap their child into a car seat, they’ll pay an extra $10 for the service on top of the base fare. This weekend, Uber is waiving that $10 fee through partnership with Care.com.

The Next Web notes that UberX drivers will have to purchase their own custom car seat, which are supplied by Uber, and carry the seat in their trunk when it isn’t in use.

An Uber spokesperson said that the company will consider expanding the service to other cities “if this experiment proves to be successful.”

Uber recently launched a pilot courier bike service, also in New York City.

Related: Protestors attack Uber vehicles in Seattle, vow to take down a ‘disgusting tech company’

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