Situational Awareness
Conflict Ground Conflict; Critical; Ground Event / Encounter Other / Unknown
Flight Crew Took Evasive Action
Procedure; Human Factors
During pushback a speeding van; which ignored the wing walkers; cut behind the aircraft causing me to stop the aircraft to avoid damage. This resulted in the shear pin on the towbar breaking.
Ramp Agent reported breaking the pushback towbar pin after having to stop suddenly to avoid colliding with a van on the ramp.