Highway Driving — Missouri Driver's License Practice Test

This section covers driving on highways, including how to use lanes, pass other vehicles safely, and enter or leave controlled-access highways. It also explains what to do in an emergency, how to handle a breakdown, and how to stay alert. Highway speeds leave little room for error, so these habits help you drive predictably and avoid crashes.

On a two-lane highway, drive in the right lane and cross the center line to pass only when there are no oncoming vehicles and no solid yellow line. On a highway of four or more lanes, keep right except when passing, letting others enter, or preparing for a legal left turn. Use the left lane only to pass, and never use the shoulder or unpaved part to pass. Before passing, check your mirrors and briefly look over your shoulder for blind spots, get through the other driver's blind spot quickly without exceeding the speed limit, and do not return to the right lane until you can see the passed vehicle in your rearview mirror.

On controlled-access highways you can enter and leave only at ramps: use the entrance ramp and acceleration lane to match highway speed, yield to traffic already on the highway, and use the deceleration lane and exit ramp to slow down. Never stop on the highway itself; if you miss your exit, get off at the next one instead of stopping, backing up, or turning around. If you break down, get off the road, turn on your flashers, place flares behind the vehicle, never stand in the roadway, and lift the hood or tie a white cloth. Watch for highway hypnosis and drowsiness — tired drivers can be as dangerous as intoxicated ones — and the cellular number to call in a highway emergency is *55.