As schools prepare to start the upcoming school year the Missouri State Highway Patrol is reminding drivers to watch for kids.

“It will be a big change for these young people after the summer break of fun in the sun, sleeping in, going to camp, or summer employment,” the MSHP said in a news release. “Instead, young people will be walking, biking, and driving to school, which brings a change in traffic patterns.”

The agency said it’s critical for drivers to be alert, especially near school zones, playgrounds and bicycle paths.

According to the MSHP most traffic crashes involving young drivers (under the age of 21) in 2014 occurred between 3 p.m. and 4 p.m., when school typically lets out.

“Drivers need to be aware of the increased traffic during this time—not just in areas around school, but all around town,” the agency said. “Remember: Many of these drivers are inexperienced. It is important to encourage those young drivers to remember driving is a full-time job. Using a cell phone, texting, or adjusting the radio can be the distraction that leads to a traffic crash. Texting is against the law for anyone under the age of 22.”

In 2014, four people were killed and 374 people were injured in school bus crashes.