Tinstafl
The FAA stats I linked to above show 1- Aviation has a very low risk of this type of accident vs other industrial areas, 2 - There are no fatal incidents in the period anywhere other than a few major hub airports, Almost all of those incidents were 'underneath' large transport aircraft, 3- There are almost no incidents of injury in non-hub airports where someone is stuck by a vehicle on the ramp.
Hence the US (litigation capital of the world) airports have not seen any need to introduce this change.
No information is available of the number of people struck by a vehicle in the airport parking lot.