If you’re at a stoplight, you only have one job: make sure the person behind you gets through.
Stay focused, and think of the people behind you.
When the light changes, go, and go quickly.
When the car in front of you starts moving, go.
The goal should be to get you and the person behind you through the light. If that happens, you’ve done your job.
To meander through is to think only of yourself and be in the way of the person behind you.
Be courteous. All of the time.