An alarm bell went off earlier this month in Park Slope.

A car driven by a woman who already had eight tickets from red light and speed cameras plowed through another red light and hit two families in a crosswalk, killing two children.

In the wake of the tragedy, Mayor de Blasio yesterday came up with a set of proposals that would create tougher penalties for repeat offenders for people like Dorothy Bruns, the woman behind the wheel in Park Slope who also may have had a seizure while she was driving.

Now it’s up to Albany lawmakers to either embrace de Blasio’s plan or explain to New Yorkers why we can live with this deadly status quo.

New York City can’t add red light cameras or strengthen their penalties without getting a green light from the state legislature. It’s been a real battle in the past for mayors to add these cameras and it’s always been a muddle of explanations from lawmakers who live far away from the five boroughs why the city shouldn’t get more of them.

De Blasio also wants New York to follow New Jersey’s lead and require doctors to notify the Department of Motor Vehicles if a patient has a medical condition that could make it dangerous to drive.

The Daily News’ Jillian Jorgensen yesterday didn’t get an answer from State Assembly Speaker Carl Heastie’s office when asked about the mayor’s proposals. While it’s perhaps understandable that a lawmaker from the Adirondacks is unfamiliar with the city’s dangerous streets, it’s a little confusing why a Bronx legislator wouldn’t leap to action after the deaths in Park Slope.

There’s some irony that state lawmakers embraced this week’s walkout in schools over gun violence but seem to be looking the other way after two children were run down on a New York street. Let’s do something.

Bob Hardt