If I'm correct, its 350+ ft. behind the aircraft because of the hot exhausts that come out of the turbine engine/engines.
follow-me vehicles
follow me
exit through the shortest route.
During anti-hijacking procedures
At a controlled airport any vehicle (another plane, car, fuel truck, snow plow, mower, or even a unicycle) may be operated in the path of a taxing aircraft, but they must have a clearance to do so from ground control. At an uncontrolled airport the aircraft should have the right of way but so does a pedestrian at a cross walk, so use your head.
All of the above
Yes, you need a license to operate a motor vehicle.
Aircraft
Yes, you need a license to legally operate a motor vehicle.
Yes, you need a license to legally operate a vehicle on public roads.
Aircraft is any vehicle capable of atmospheric flight. due to interaction with the air.
Unless it is a service vehicle that is in use for maintanence, you should never park directly in front of an aircraft.