Private bus lines that do business in the city must, must, must be forced to adhere to safety laws.

Try as the mind wills it, nothing can roll back the wheels of the tour bus that careened at horrifying highway speed down a predawn Queens boulevard, slamming into an MTA bus and killing a passenger, a pedestrian and the man at the wheel of the vehicleturned-killing machine.

But in memory of the dead, in prayer for the more than a dozen injured, in defense of a city where such 15-ton projectiles hurtle through night and day, ubiquitous private bus lines like the Dahlia Group that do business in the five boroughs must, must, must be forced to adhere to state safety laws that are supposed to keep deadly drivers far from the wheels of monster vehicles.

Where those laws let menaces ram through loopholes, the state Legislature must quickly close them.

Investigators have yet to definitively determine exactly why the private bus raced across the intersection and rammed into the city bus.

But we must allow for the very real possibility that Raymond Mong, who sat behind the private bus’ wheel, was murderously negligent.

Mong had been fired by the MTA following a 2015 conviction for drunk driving in Connecticut that also nailed him for leaving the scene of the crash he caused.

That didn’t stop him from getting a job driving long hauls for Dahlia.

It probably should have. A New York statute sidelines bus drivers convicted of fleeing a crash within the previous five years, while off duty, if anyone is injured. The same state law also forbids driving a bus after two DWIs, in any state.

Some way, somehow, Mong slipped through. And that may be why two other people are dead.

Given the company’s long trail of recklessness, this comes as little surprise. Federal records show Dahlia Group responsible for three previous fatalities, and a trail of seven unsafe driving violations in just the last two years. At least twice, its buses have rolled over while racing to area casinos.

Companies proven over and over again to treat lives of customers and strangers alike as expendable have no business doing business here.