Fog driving — Hawaii Permit Test

In Hawaii fog is met on roads at higher elevations, where low-lying clouds meet the ground, and patches of fog can appear suddenly.

A driver climbing a mountain road at speed can drive straight into a cloud with no warning.

Fog may be encountered on roads at higher elevations where low-lying clouds meet the ground surface.

If you must drive in fog, sharply reduce speed and use low-beam headlights, never high beams: their light reflects back and cuts your own and the oncoming driver's vision.

High beams light up the fog itself like a white wall, so you see less road than with low beams.

Sharply reduce speed and turn on low beam head lamps.

If fog keeps you from seeing at least two car lengths (40 feet), pull completely off the pavement and stop.

A driver who keeps going when he cannot see two car lengths will not see a stopped car in time to stop.

If you are unable to see at least two car lengths (40 feet or 12 meters), pull completely off the pavement and stop.

After pulling off the pavement and stopping in fog, turn on your hazard warning signals.

A car parked beside the road in fog is hard to see, and flashing lights warn the next driver it is there.

Turn on the hazard warning signals.

The fog precautions also apply whenever visibility is reduced for any reason, such as heavy rain, smoke or heavy snow.

Smoke from a brush fire hides the road just as fog does, and the same slow, low-beam driving keeps you safe.

*These precautions also apply when visibility is reduced for any reason: heavy rain, smoke, fog, heavy snow, etc.

Where are you most likely to meet fog on Hawaii's roads?

On roads at higher elevations. A driver climbing a mountain road at speed can drive straight into a cloud with no warning. State of Hawaii Driver’s Manual, p.76: “Fog may be encountered on roads at higher elevations where low-lying clouds meet the ground surface.”