Final answer:
To safely enter traffic from being parked at a curb, signal and wait for a safe gap in traffic. This minimizes the risk of accidents and ensures that other drivers are aware of your intentions.
Step-by-step explanation:
When entering traffic from being parked at a curb, you should signal and wait for a large enough gap in traffic. This approach is the safest method to re-enter traffic flow. It allows for other drivers to be aware of your intentions through your signal and provides time for you to assess the traffic situation, ensuring there's an adequate and safe gap for you to merge into. You should not plan to pull from the curb quickly or without signaling, as this can be dangerous and make other drivers unable to anticipate your actions. Additionally, using your horn is only useful to alert others of your presence if they may not see you, but it is not a means to assert immediate movement into traffic.