I have a question about highway/freeway driving. What is an appropriate way to indicate to a slower vehicle in the fast lane to move over? If I approach a slower car from behind, we're both in the fast lane, and they are going the same speed or slower than the cars in the next lane, is there an appropriate way to ask them to move over? What if they don't respond to your fast approach, your constant presence in their rear view mirror, your brights, ... This is a question especially about drivers who appear to have noticed you but also appear to have no idea they should move over. Thanks!