Blocking an intersection during "rush hour" traffic is not permitted:

  1. Unless you entered the intersection on a green light.
  2. Under any circumstances, even if your light is green. ✓
  3. Unless you have the right-of-way or a green light.

Answer: B. Under any circumstances, even if your light is green.

Blocking an intersection is not allowed under any circumstances, even when your light is green.

Why this is the answer

The handbook says a green light means go, but it does not give you the right to occupy an intersection you cannot clear. You should stop for any vehicle, bicyclist, or pedestrian already in the intersection, and you should stay out of the box when there is not enough room to clear it before the light changes. It also warns against pulling into the intersection on green when pedestrians or vehicles are in your way. Rush-hour congestion does not create an exception; if there is no room, you wait.

Why the other answers are wrong

Remember it

Green means go only if there is room to clear the intersection.

Official handbook: California Driver Handbook (DL 600), Section 7: Laws and Rules of the Road, p. 34

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.