Final answer:
The accepted rule before passing in front of another car is to ensure that it is safe and legal to do so. Check your blind spots, use turn signals, and look for a sufficient gap in traffic.
Step-by-step explanation:
The accepted rule before passing in front of another car is to ensure that it is safe and legal to do so. Before changing lanes or passing another vehicle, you should always check your blind spots, use your turn signals to indicate your intention, and make sure there is a sufficient gap in traffic to safely complete the maneuver. Additionally, it is important to follow any specific laws or regulations regarding passing in your area, such as speed limits or no-passing zones.