The death of a 28-month-old toddler, the victim of a car crash that caused a vehicle to smash into her stroller, is wrenching. We expect parents everywhere shuddered when they heard the news.

Two vehicles — one going north, the other south — on 140th Avenue Northeast at Bel-Red Road crashed in the intersection. The toddler and her mother were on an adjacent sidewalk.

Police say the drivers of both vehicles are cooperating in the investigation and Bellevue Police Chief Steve Mylett said it doesn’t appear that alcohol or drugs played a role in the crash.

But, clearly, something went wrong. Police say the most likely reason was the failure of the northbound driver — who was attempting to turn left from 140th Avenue Northeast onto Bel-Red Road — to yield to oncoming traffic.

The rule is simple, police say: drivers must yield to all oncoming traffic when making a left turn at a signal displaying a flashing yellow arrow. Those arrow lights have been installed at a many intersections throughout Bellevue.

Police still are investigating, of course. But Chief Mylett offered this assurance: “We will find out exactly what happened.”

Parents — everybody! — will want to know.