For New York City’s e-bike and scooter riders, it’s time to slow down.

The city’s new 15 mph speed limit for these vehicles takes effect Friday. Officials say it will help improve street safety among the soaring number of delivery workers and residents who use the zippy bikes to get around, as well as pedestrians and drivers. How exactly the city will enforce the restriction, though, remains to be seen.

Regular bikes are not subject to the new speed limit because they are lighter than e-bikes, and can continue traveling up to 25 mph, according to the guidelines .

Mayor Eric Adams first proposed the rule change in June, saying it aligned with similar speed limits imposed in European bike lanes and came in response to New Yorkers’ concerns. The NYPD had cracked down earlier this year

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