If a car going more than 40 mph hits an 8-year-old, that child’s likely going to be maimed or killed. And The Post clocked multiple vehicles in the high 30s and low 40s Thursday — all in a school zone whose speed cameras stand disabled because the state Senate didn’t reauthorize them.

In all, we recorded dozens of speedsters rushing past PS 124 in Park Slope, each a potential killer if school were in session.

Which is why the Senate has to come back and pass the speed-camera bill before school starts up again in the fall.

Happily, the Times-Union reports that Senate Majority Leader John Flanagan is already canvassing his members about coming back for a special session. Since the bill has broad bipartisan support, it should be easy enough to get a quorum to do the job.

By all accounts, the holdup has been Sen. Simcha Felder, the Democrat who provides the key vote to make Flanagan majority leader. Yet it’s not just unconscionable to give Felder (or anyone else) a veto here, it’s political suicide: Every vulnerable Republican will face opposition ads charging that senator with endangering kids’ lives. And if they lose one seat, Felder is irrelevant.

Yes, the blame here goes far beyond Flanagan or Felder: City Hall’s efforts to lobby the Legislature range from vacuous to imperious, neither of which helps get things done. And the Assembly has its own long string of failures to tighten traffic-safety laws.

But it’s up to Flanagan now: Pass the camera bill, or wind up with blood on your hands.