Multiple-car crashes backed up traffic on San Diego highways Tuesday.

Sig Alerts were issued for both Interstate 805 and Interstate 8 during the morning commute.

The first Sig Alert was issued just before 8 a.m. after four crashes involving 10 cars closed three lanes of I-805 in Chula Vista, according to the California Highway Patrol.

The crashes began when the driver of a Ford Mustang crashed with a pickup truck.  While trying to avoid the original accident, four other cars rear-ended each other.  Two more sets of two cars rear-ended each other trying to avoid the four car pile-up, totaling 10 cars involved.

Felipe Orozco was heading to school on southbound I-805 when the crashes occurred.

"I just heard a big crash and the car was on top of us. You could hear the crystal cracking," Orozco said.

“Suddenly everybody stopped and I tried to stop and I just hit the car in front of me, and then they hit me,” Lorena Sosa, a driver of one of vehicles, said.

One person in the original crash was hurt and taken to the hospital with neck pain.

"Cars just kept stopping and by the time we stopped the cars had already hit," Orozco said.

Orozco was counting his blessings that the injury count was not higher.

"I think it's impressive. I mean, God's will at its best, you know? He could have taken someone right now, but he had us here," he said.

The second Sig Alert was issued for westbound I-8 at Severin Drive.

The crash was reported at 8:49 a.m. and involved up to seven vehicles including a Mustang, Elantra and a Jeep Wrangler.

Debris spilled across the freeway and two lanes were blocked while crews responded.

Both freeway were cleared by 9:30 a.m.