New 25 mph speed limit signs are seen at the Department of Transportation garage in Maspeth, Queens on Nov. 6, 2014. (credit: Marla Diamond/WCBS 880)

NEW YORK (CBSNewYork) — It’s the law, 25 mph or else.

City Department of Transportation crews were out Friday putting up new signs to replace those showing higher speed limits.

The new default speed limit applies to all streets where no other limit is posted. Highways like the FDR, West Side Highway and Riverside Drive will still have higher limits and school zones will have lower limits.

The 25 mph limit also does not apply to the following streets and parkways: Webster Avenue and Mosholu Parkway in the Bronx; Hylan Boulevard and Richmond Terrace on Staten Island; Fort Hamilton Parkway and Ocean Avenue in Brooklyn; and Utopia Parkway and Bell and Springfield boulevards in Queens.

DOT Commissioner Polly Trottenberg said the first 89 signs will be going up at “key gateways to the city.”