You should dim your headlights whenever you are within ________ of an oncoming vehicle.

Explanation

The South Dakota Driver License Manual recommends that you dim your headlights to low beam whenever you are within 500 feet of an oncoming vehicle. However, unlike the laws of many other states, South Dakota law doesn't require an exact distance like this. Rather, it merely requires you to dim your headlights whenever you meet another vehicle or pass another vehicle. South Dakota law does require you to dim your headlights whenever you are within 200 feet of a person on the road ahead of you.