It is against the law to enter an intersection when:
- You can't get all the way across before the light turns red. ✓
- The light is flashing yellow and you didn't stop first.
- The light is yellow and you cannot stop safely.
Answer: A. You can't get all the way across before the light turns red.
It is against the law to enter an intersection when you cannot get all the way across before the light turns red.
Why this is the answer
The handbook says you should not start into an intersection unless your vehicle can get completely across before the signal turns red. It also says blocking an intersection when there is not enough room to cross before the red light is against the law. That makes room to clear the intersection the key issue. The rule is about keeping the intersection open, not about stopping first for a flashing yellow or about a yellow light you cannot stop safely.
Why the other answers are wrong
- B. The light is flashing yellow and you didn't stop first. — A flashing yellow light is a warning to proceed with caution, and the handbook says you do not need to stop for it, so not stopping first does not make entering illegal.
- C. The light is yellow and you cannot stop safely. — The passages do not make entering on a yellow light illegal when you cannot stop safely; the stated law is about not having enough room to clear the intersection before the red light.
Remember it
Before you start across, ask yourself whether your whole vehicle will fit through before the red. If not, wait behind the limit line.