MINNEAPOLIS (WCCO) — A new study found as many as one in three vehicles have a distracted driver in school zones.

Researchers found 88 percent of all drivers are using their phones behind-the-wheel. Driving crashes are the leading cause of death among teenagers.

The group “Zendrive” analyzed almost 4 million drivers cruising near 75,000 schools.

In general, the afternoon pick up time is more dangerous than the morning drop off.

Schools in Hennepin, Ramsey and Dakota Counties were given a “D” rating for safe driving around schools.

Click here to see how your child’s school rates.