Left turn on red permitted only from a 1-way street onto a 1-way street.

• A. From a 1-way street onto a 1-way street.
• B. From a 2-way street onto a 1-way street.
• C. From a 1-way street onto a 2-way street.
• D. Never allowed.

Answer: (A)

Left turns on red are allowed only in a very specific situation: you may turn left on red when you are starting from a one-way street and turning onto another one-way street, and only after coming to a complete stop and yielding to pedestrians and other traffic unless a sign says otherwise. This setup prevents entering traffic that is coming from the opposite direction on a cross street and keeps the turn predictable for drivers and pedestrians.

Turning left on red from a two-way street onto a one-way street isn’t allowed because you would be merging into traffic that has vehicles approaching from two directions. Turning left on red from a one-way street onto a two-way street isn’t allowed for the same reason—cross traffic on the two-way street could be coming from either direction, creating a dangerous situation. Remember, always look for signs that prohibit left turns on red.