A thick fog around Tracy on Friday morning kept local police busy as it contributed to at least two car crashes.

The California Highway Patrol handled six crashes in a half-hour span between 7:45 and 8:15 a.m. Friday. CHP spokesman Robert Rickman said officers confirmed that two of those crashes were the direct result of dense fog.

“The No. 1 reason there are collisions in the fog is speed,” he said. “That’s not just in Tracy, it’s everywhere. People are going too fast.”

In the two fog-related crashes, Rickman noted that people were driving about 10 mph under the posted speed limit, but with limited visibility that was too fast.

“Even 45 mph when visibility is down to 100 to 150 feet, that’s too fast.”

Two people were taken to Sutter Tracy Community Hospital after a Nissan Quest slammed broadside into a Ford Focus at the intersection of Corral Hollow and Clover roads at about 7:45 a.m. Rickman said the Ford was stopped on Clover Road and started to make a left turn onto southbound Corral Hollow Road when the northbound Nissan crashed into it.

Rickman said the Nissan was probably going between 20 and 25 mph, in a 35 mph zone but the visibility was only about 200 feet. The man in the Ford complained of neck, back and abdominal pain. The woman in the Nissan complained of pain in her ribs and legs.

The CHP got another call at 8 a.m. for a crash on Highway 33 at Lehman Road. Rickman said a GMC delivery truck had just come off of southbound Interstate 5, stopped at the intersection of the off-ramp and Highway 33, and started to cross to Lehman Road.

A southbound Nissan Quest crashed into the right rear of the truck and caused it to overturn and the Nissan to catch fire. Rickman said both the man in the truck and the teenage girl in the Nissan got out safely, and the truck driver put out the blaze with his fire extinguisher.

He added that the Nissan was going about 45 mph in a 55 mph zone but visibility was between 100 to 150 feet.