The car behind you. When driving, someone is usually behind you. If theyexpect you to get out of the way for them, they are Expecters. Theyexpect to get to the destination with no barriers. Expecters are also BMW driver, ambulences, police, fire briagade and old people. See example below.
The Expecters were behind me yesterday when i was rollin in my benzo - they had tier sirens on as well.