Perhaps they are waiting for the next exit. Then they'd be moving out and then coming back in. Going slowly but guaranteeing your slot in to your exit is better

Perhaps they are waiting for the next exit. Then they'd be moving out and then coming back in. Going slowly but guaranteeing your slot in to your exit is better than keeping speed and not being able to get back in. You can't trust the other traffic to give you room. After all, you look like a guy who just decided to overtake one exit before his own.