Which signal indicates a prohibition of a right turn on red?

• A. Red light
• B. Red arrow
• C. Green light
• D. Yellow light

Answer: (B)

The signal that indicates a prohibition of a right turn on red is a red arrow. A red arrow specifically means that drivers must stop and cannot proceed in the direction the arrow is pointing. This is particularly important for right turns, as a red arrow pointing to the right clearly indicates that a driver must not turn right until the light changes to a green signal or another indication permits the turn.

Unlike a standard red light, which may allow for certain movements after stopping, a red arrow provides an unequivocal directive that turning in that particular direction is not allowed. While other signals like a green light indicate you can proceed, or a yellow light suggests caution before the light changes, they do not convey the same prohibition on turning as a red arrow does.