how easy it would be to get a man, with a radio (that's RT to you) binoculars, and two big flags...one red, one green.
station them at each intersection. ATC is still responsible for the clearance to cross, but the guy with the flags could still stop you...he would be the backup set of eyes for atc from a differtent view point. if he gave you the red flag (illuminated at night) stop...PERIOD, green is good provided ATC has given the equivelent of green via radio.
Flag man is also maintaining a listenting watch on the radio.
Bomarc, you forgot to mention the man with with a ringing bell walking in front of the aircraft taxying to the stand.
