Where do you stop at temporary traffic lights?

• A. After the traffic lights, but before the construction zone.
• B. Where the lane ends.
• C. At the 'Stop here on red signal' sign.
  Explanation:

  "The sign indicates where it is safe to stop. Also, some automated lights have a sensor for vehicles waiting at a red light so they know to turn the lights green again after a certain period of time. Stopping forward of this sensor may mean the light does not change green."