According to Reuters, a judge has struck down a NYC rule “limiting how much time drivers for ride-hailing services can spend cruising streets in busy areas of Manhattan without passengers.”

Uber and Lyft filed separate lawsuits challenging a NYC rule that was designed to ease congestion. With ride-sharing vehicles making up nearly a third of peak traffic, the city was attempting to prevent ride-sharing drivers from cruising the streets while waiting for new passengers.

New York State Supreme Court Judge Lyle Frank issued his ruling in the case Uber brought, although he made it clear his ruling covered Lyft’s case as well, calling NYC’s cruising cap rule “arbitrary and capricious.”

The mayor’s office indicated it may fight the ruling however, with a spokeswoman for the mayor saying: “We put these rules in place to protect hardworking drivers and New Yorkers—and we’ll fight to keep them.”