I had a similar experience to one of the other drivers on April 4, 2013. I was going 65 mph (not speeding) and passed a police vehicle on the shoulder that had apparently pulled over a speeder. He came roaring after me, pulled me over, and gave me a ticket for "failure to change lanes when approaching an emergency vehicle." He said if I couldn’t change lanes, then the law says I would have to slow down to 20 mph. It’s one thing if the emergency vehicle is moving, but it was stopped on a wide shoulder, while saying I must suddenly slow down that much on an interstate could provoke a serious accident. Seemed obvious that the cop was just out to shake down motorists.