<human>: Driving to work today, a car in the left lane beeped at me.  I glanced over, and the driver is gesticulating at me, making it clear that she wants to move to the right lane.  There wasn't any car in front of me for a while, she could have moved over earlier.  I started to slow down, then realized that she was doing the same, and we were both, at that point, travelling ten miles under the speed limit.  I decided to just zip past so she could get in behind me, but didn't take into account the fact that other cars had started to pile up a bit behind us.  She flashed her lights at me as I drove off into the distance.  Should I have let her in?

Can you summarize the given text in a few sentences?
<bot>: Slow car in left lane wanted to get over, and I was going to let them until I realized how slow they were going*