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Oklahoma CDL — General Knowledge practice

Signals & Pavement Markings

How to read traffic signals, lane lines, and pavement markings — including yellow and white lines, arrows, and flashing lights.

Content reviewed against official driver handbooks · July 7, 2026

13 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.

Study questions with answers

12 sample Signals & Pavement Markings questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.

  1. 1. When another driver seems eager to pass, what should you NOT do?

    Correct answer: Signal to them that it is clear to pass

    Do not signal or wave others to pass; if a crash results you could be blamed for it.

    Source: Oklahoma CDL Manual — Communicating

  2. 2. How can you warn drivers behind you that you are about to slow down?

    Correct answer: Lightly tap the brake pedal to flash the brake lights

    Tapping the brake pedal lightly a few times flashes your brake lights to alert drivers behind you.

    Source: Oklahoma CDL Manual — Communicating

  3. 3. On a two-lane road, the pavement approaching a rail crossing is often marked with a...

    Correct answer: No-passing marking

    Two-lane roads use an 'X' with 'RR' plus a no-passing marking before the tracks.

    Source: Oklahoma CDL Manual — Railroad-Highway Crossings

  4. 4. After you finish a turn, what should you do with your turn signal?

    Correct answer: Turn it off if it does not cancel itself

    Turn the signal off once the turn is complete if it does not cancel on its own.

    Source: Oklahoma CDL Manual — Communicating

  5. 5. Before you change lanes, what should you do?

    Correct answer: Turn on the signal before starting the move

    Put your turn signal on before moving over, then change lanes slowly and smoothly.

    Source: Oklahoma CDL Manual — Communicating

  6. 6. Clearance, marker, and reflector colors at the front of your vehicle should be...

    Correct answer: Amber

    Front-facing clearance lights and reflectors are amber, while the rear uses red.

    Source: Oklahoma CDL Manual — Section 2: Driving Safely

  7. 7. Why should you keep your turn signal on through the whole turn?

    Correct answer: So you keep both hands free to steer and others know your plan

    Signaling continuously lets you keep both hands on the wheel and keeps others informed until the turn is done.

    Source: Oklahoma CDL Manual — Communicating

  8. 8. When should you turn on the four-way emergency flashers?

    Correct answer: When driving very slowly or stopped

    Use the flashers when you are driving unusually slowly or are stopped so others notice you.

    Source: Oklahoma CDL Manual — Communicating

  9. 9. At the rear of the vehicle, marker lights and reflectors should be what color?

    Correct answer: Red

    Rear clearance lights, reflectors, and taillights are red.

    Source: Oklahoma CDL Manual — Section 2: Driving Safely

  10. 10. At night, one way to let a vehicle you are about to pass know you are there is to...

    Correct answer: Flash your headlights from low to high beam

    When legal, flashing your headlights from low to high beam helps signal your presence to the other driver.

    Source: Oklahoma CDL Manual — Communicating

  11. 11. You must dim your high beams when an oncoming vehicle is within how many feet?

    Correct answer: 500 feet

    Dim your high beams once an oncoming vehicle is 500 feet away, and do the same when trailing one that close.

    Source: Oklahoma CDL Manual — Night, Fog & Winter Driving

  12. 12. One good rule for using turn signals is to...

    Correct answer: Signal well before you begin turning

    Signal well ahead of the turn; doing it early is your best chance to stop others from trying to pass.

    Source: Oklahoma CDL Manual — Communicating

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Every Oklahoma question is written from the official Oklahoma driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free