South Dakota Drivers Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

A solid white line on the road indicates a no-passing zone. This means that drivers are not permitted to cross this line to overtake another vehicle. The solid white line serves to promote safety by preventing lane changes and keeping traffic orderly, particularly in areas where visibility is limited or where crossing could create a hazardous situation.

While there are solid white lines that separate lanes of traffic moving in the same direction, these lines do not allow for lane changes; doing so would violate the indication of the line. This is important because a solid line is a visual cue that suggests drivers should stay in their current lane for safety reasons. In contrast, dashed lines are used when lane changes are permitted. Solid white lines also do not designate pedestrian crossings; instead, crosswalks typically feature distinct markings to alert drivers to pedestrian activity.