Texas driver's examination

Warning signs alert drivers to conditions that are immediately ahead and tell them what to look for. When encountering a warning sign, drivers should pay attention to their surroundings, follow instructions provided by the sign, and reduce their speed, if recommended.

The driver traveling on the frontage road of a controlled-access highway must yield the right-of-way to a vehicle entering or about to enter the frontage road from the highway. They must also yield the right-of-way to a vehicle leaving or about to leave the frontage road to enter the highway.

Crossbuck signs tell drivers to yield to trains at a railroad crossing. Drivers should not try to outdrive a train.

If you approach an emergency vehicle, tow truck, or roadside assistance vehicle that is stopped with its lights flashing, you must change lanes to allow the vehicle extra space. If there is only one lane moving in your direction, or if changing lanes would be unsafe, you must slow down to a speed below the posted speed limit and give the stationary vehicle as much room as possible. Always slow down and be prepared to stop when you approach an emergency scene.

Use low beam headlights when driving at night and following closely behind another vehicle or within 500 feet of a vehicle approaching from the opposite direction. Use low beam headlights when driving in fog, rain, dust, sleet, or snow.

This is a "Keep right" sign. It indicates that a traffic island, median, or barrier is ahead and that drivers must keep to the right of it.