Two freeway crashes Saturday involving women and children demonstrated that seat belts help reduce serious injuries, fire department representatives said.

The first crash occurred just before 7 a.m. when a woman driving a compact car eastbound on Interstate 10 near Kino Parkway, hit the guardrail and rolled off the shoulder of the road into the dirt, Capt. Jeff Langejans, spokes-man for the Tucson Fire Department, said in a news release.

A 13-year-old boy was found lying outside the car. The driver and her 16-year-old daughter were still in the car when TFD personnel arrived, Langejans said.

"There was significant damage to the vehicle, but because all passengers were wearing their seat belts they only sustained minor injuries," he said. The family was taken to a hospital for a medical assessment.

Just before 2 p.m., the another driver lost control of her vehicle and rolled on I-10 just west of the Marana exit.

"All occupants were restrained with appropriate seat belts or car seats based on age and weights of the children," Capt. Adam Goldberg, spokesman for Northwest Fire/Rescue District, said in an email. "This is significant and led to minor injuries for all involved."

The woman, in her 20s, and her three sons, ranging in age from 2 to 8 years old, were taken to a hospital for evaluation, Goldberg said.