When pulling out from a parked position to re-enter the traffic, how long should you use your turn signal?

• Briefly, just before entering traffic
• Long enough to clearly alert oncoming traffic
  Explanation:

  "If you are parked at a curb or roadside and are about to re-enter traffic, use your signal long enough to alert oncoming traffic that you are moving from the parked position back into the traffic lane."
• Continuously until you move back into the traffic lane
• Avoid using your signal if there's no oncoming traffic