Fog covered many mid-Missouri roadways late Sunday and early Monday, making for a low-visibility commute.
"I passed one car that didn't have headlights on and I couldn't see it until they were right on there...on me," David Dillon, of Steedman, said.
Fog is most common at night and in the early morning. While relatively common in mid-Missouri, it still catches some people off guard.
"I get nervous, because I can't see and don't know what's in front of me," Dara Shirley, of Fulton, said.
"It makes me proactive to be careful," Terry Martin, of Jefferson City, said.
"I turn on the lights, and I slow down so that I don't get too close to somebody too quickly."
Low visibility is being blamed for an accident on Highway 54 near Callaway County Road 114 around 1 a.m. Monday. A woman told police she hit a man that was walking along the highway; she said the man was wearing black clothing and she couldn't see him because of the fog.
"I've seen it before, when it's foggy and the next thing you know you pass somebody and you didn't even know they were there," Trevor Simpson, of Macon, said.
"Especially if they're not wearing any type of fluorescent clothing or...it's too late by the time you would see them," Dillon said.
If you hit dense fog while driving, your first precaution should be to slow down.
"The condensation is going to start to build up on the windshield, so we ask you to use windshield wipers," Sergeant Paul Reinsch of the Missouri State Highway Patrol said.
"And then state law says any time you're using your windshield wipers your headlights have to be on. Preferably on low beam because if you turn the headlights on high beam that actually reflects the light and blinds the driver."
Reinsch also recommends using the side of the road as a guide rather than lights from the cars in front of you; other cars could be going off the road or into the other lane.