If an emergency vehicle is in your lane displaying red flashing lights or using a siren, what must you do?

When you see an emergency vehicle in your lane displaying red flashing lights or using a siren, the appropriate action is to pull over to the curb and stop. This is critical for ensuring the safety of emergency responders and allowing them to perform their duties without obstacles. Stopping allows the emergency vehicle to pass through safely and quickly, as these vehicles often respond to urgent situations where every second counts.

By pulling over, you are complying with traffic laws designed to protect both first responders and those who may be in distress. It's important to make this maneuver safely, giving signals when necessary and checking for any pedestrians or other vehicles before stopping. This action helps maintain order on the roadway and minimizes the risk of accidents.

The other options would not be proper responses to an emergency situation. Speeding up might create confusion and increase the risk of collisions, continuing to drive disregards the law and public safety, and changing lanes without awareness could endanger other drivers. Thus, stopping and yielding to the emergency vehicle is the best course of action.