Commercial Fixed Wing
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
General None Reported / Taken
Human Factors
I was the First Officer (FO) side wing walker for flight arrival in ORD. As the plane was making the turn to the lead in line a tractor cut in front of the aircraft from the Captain (CA) side. I was on the opposite side; but raised my wands in a stop signal to stop arrival. This was not heeded and arrival continued; causing a near miss event. Due to these events; the aircraft was parked off the line and required repositioning. The push back driver did not give signal before pushing the aircraft and the aircraft beacon was not flashing. I was in position at the FO side wing roadway; but the CA side wing walker was still looking for wands. The pushback driver pushed the aircraft anyway; just as another tractor was approaching to pass behind from the CA side. Again I noticed and gave the stop signal. This was ignored; so I gave the emergency stop signal. The push back driver was oblivious and continued the push regardless. Luckily; the tractor veered out of the way before being struck.
Wing walker described a gate arrival during which a conflict developed with vehicles on two occasions and his signals to the Marshall to stop were ignored.