Traffic Signs, Signals, and Road Markings
Reading the Road's Three Languages
Signs, signals, and markings each communicate in a different way, and exam questions test whether you can tell them apart. Signs are classified by shape and color: octagons mean stop, inverted triangles mean yield, diamonds warn of hazards ahead, pennants mark no-passing zones, and rectangles carry regulatory or guide information. Color is a second cue - red for prohibitions, yellow for warnings, orange for work zones, green for guidance, blue for services, and fluorescent yellow-green for pedestrians and cyclists.
Signals control traffic in time rather than space. A steady red means stop; a flashing red is a stop sign; a steady yellow warns that red is coming and you should stop if safe; a flashing yellow means proceed with caution. A green arrow gives protected movement in that direction only. Remember that a dark or failed signal is treated as a four-way stop.
Markings paint the rules on the pavement. Yellow lines separate traffic moving in opposite directions; white lines separate traffic moving the same way. A solid line means no crossing; a broken line permits crossing when safe. Double solid yellow forbids passing in both directions. Edge lines, crosswalks, and stop bars are all markings with legal force.
Traps to Watch
Questions love to swap categories - describing a warning sign as regulatory, or a flashing yellow as a stop. Another common trap: assuming a green light always means go, when pedestrians in a crosswalk or blocked intersections still require you to wait. Also watch for questions about yellow lights - the correct answer is almost always "stop if you can do so safely," not "speed up."
Rule of Thumb
Ask: Is it telling me what to do (regulatory), what's coming (warning), or where to go (guide)? That single question resolves most sign questions.