Question

1. this sign means:

trucks under 18,000 lbs. allowed. ......
hill ahead. ...............................
truck stop ahead. ........................
no trucks allowed. .......................

1. fog can greatly reduce the visibility of other vehicles, pedestrians, and traffic signals. when driving in fog, you should:

drive cautiously and reduce your speed. ...............................
not use your high beam headlights. ....
use low beam headlights to better illuminate the road and objects. ........
all of the above. .......................

Explanation:

• For question 29: The sign with a truck on a slope is a standard warning sign for an upcoming hill.
• For question 30: When driving in fog, driving cautiously and reducing speed is essential for safety. High - beam headlights can reflect off the fog and reduce visibility further, while low - beam headlights are more effective at illuminating the road and objects in foggy conditions. So all the given options (drive cautiously and reduce speed, not use high - beam headlights, use low - beam headlights) are correct.

Answer:

1. Hill ahead.
2. All of the above.