Tule Fog - Visibility

Visibility

Visibility in tule fog is usually less than an eighth of a mile (about 600 feet or 200 meters), but can be as little as a foot (about 30 cm.) Visibility can vary rapidly; in only a few feet visibility can go from 10 feet to near zero.

The variability in visibility is the cause of many chain-reaction pile-ups on roads and freeways. In one such accident on Interstate 5 near Elk Grove south of Sacramento, 25 cars and 12 big-rig trucks collided inside a fog bank in December 1997. Five people died and 28 were injured. In February 2002, two people were killed in an 80-plus car pile-up on State Route 99 between Kingsburg and Selma. On the morning of November 3, 2007, heavy tule fog caused a massive pile-up that included 108 passenger vehicles and 18 big rig trucks on Northbound State Route 99 between Fowler and Fresno. Visibility was about 200 feet at the time of the accident. There were two fatalities and 39 injuries in the crash.

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Famous quotes containing the word visibility:

    My children have taught me things. Things I thought I knew. The most profound wisdom they have given me is a respect for human vulnerability. I have known that people are resilient, but I didn’t appreciate how fragile they are. Until children learn to hide their feelings, you read them in their faces, gestures, and postures. The sheer visibility of shyness, pain, and rejection let me recognize and remember them.
    Shirley Nelson Garner (20th century)