Traffic Signs & Signals — Pennsylvania
Pennsylvania CDL practice test: 392 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Traffic Signs & Signals: 5 questions.
Regulatory, warning and guide signs, plus traffic light and pavement marking questions.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | Traffic Signs & Signals |
| License test | Pennsylvania CDL permit (CLP) knowledge tests |
| Topic questions | 5 (1% of 392 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
Not yet verified
Advertisement
Questions (5)
1. When approaching a drawbridge that is controlled by a traffic signal, you may proceed:
- If the signal is green. ✓
- Only after coming to a complete stop 50 feet before the bridge.
- Only if other vehicles are also proceeding.
- Only after getting out of your vehicle to check the conditions.
Answer: A. If the signal is green.
You may proceed when the drawbridge's traffic signal is green. The handbook separates drawbridges with signals or an attendant from those without them. At a bridge with no signal light or traffic control attendant, you must stop at least 50 feet before the draw and check that it is fully closed. When a traffic light shows green, the rule changes: you do not have to stop, but you still must slow down and confirm it is safe. That matches proceeding on a green signal.
2. If a traffic light has been green for a long time:
- It will probably stay green as you approach.
- It is likely broken.
- It is likely that the light will soon change to yellow. ✓
- It is likely the light will skip yellow and change from green to red.
Answer: C. It is likely that the light will soon change to yellow.
If a traffic light has been green for a long time, expect it to soon change to yellow. The handbook tells drivers to look far ahead and treat a long-lasting green as a sign that the light will probably change before they arrive. It says to start slowing down and be ready to stop. Since the change is expected as you approach, the best match is that yellow is likely coming soon. The manual does not say the light is broken or that it will skip yellow.
3. A vehicle stopped at a green light may indicate that the driver:
- Is impaired. ✓
- Is colorblind.
- Does not know the rules of the road.
- Is very patient.
Answer: A. Is impaired.
A vehicle stopped at a green light may indicate that the driver is impaired. The handbook lists stopping at a green light, along with waiting too long at a stop, as stopping at the wrong time. It places that behavior with weaving, drifting, and leaving the road, actions that show a driver is not responding normally to the traffic situation. Among the choices, impairment fits a driver who fails to go on a green signal; the passage does not tie the stop to colorblindness, rule ignorance, or patience.
4. What does the trailer air supply control look like?
- It is a square blue knob.
- It is a triangular yellow knob.
- It is an eight-sided red knob. ✓
- It is a circular orange knob.
Answer: C. It is an eight-sided red knob.
The trailer air supply control on newer vehicles is a red eight-sided knob. The handbook describes the trailer air supply control in the cab, which operates the tractor protection valve. On newer vehicles it is a red knob with eight sides. You push it in to send air to the trailer and pull it out to cut the air off and apply the trailer emergency brakes. The same knob pops out on its own when air pressure falls to roughly 20 to 45 psi, closing the tractor protection valve. Older vehicles may instead have a lever rather than a knob.
5. One reason for you to sign a previous driver’s vehicle inspection report is if:
- The previous driver dated their entry.
- Reported defects are certified to have been repaired. ✓
- You plan to drive for longer than one hour or travel farther than 50 miles.
- The report is left on the dashboard.
Answer: B. Reported defects are certified to have been repaired.
You should sign the previous driver's vehicle inspection report when reported defects are certified to have been repaired. The handbook says that before driving, you review the inspection report made by the previous driver. You sign that report when defects noted earlier have been certified as fixed, or certified as not requiring a fix. Your signature is your certification that those reported defects were taken care of. So the reason to sign is that reported defects are certified as repaired.
Advertisement
Source
Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook