Not only is there the 1/4 lap rule (which is stated but consideration is given, drivers are told to stop immediately) but drivers are told in meetings at MSCS events that they are absolutley to keep the lane open so the ambulance may enter. Mr. Darland apparently was more concerned with getting his tire changed than allowing the ambulance easy access to the track. I have lost a lot of respect for this driver - the red comes on for a reason - and tire changes take seconds he wasn't going to lose anything by waiting the same amount of time as the other drivers.