Emergency personnel responded about 8:50 a.m. Tuesday to a multi-vehicle crash on Route 3 at Old State Route 3 near the Sydenstricker Nobbe dealership south of Waterloo.

Responding agencies included the Waterloo Fire Department, Monroe County EMS and Monroe County Sheriff’s Department.

The MCSD said a pickup truck disobeyed the stop sign at Old State Route 3 and struck the trailer of a semi. Only minor injuries were reported in that crash. However, police said a person who had stopped to help and was outside of his vehicle was struck by a second semi truck traveling on Route 3.

The pedestrian was transported to an area hospital for treatment of serious injuries.

Police said the driver of a 2005 Volvo D12 semi, James Notter, 59, of Red Bud, was traveling south on Route 3 and turned onto Old State Route 3 to avoid debris from the initial crash. Notter told police he did not see a parked vehicle and struck it, as well as pedestrian Jerry McCauley, 67, of Red Bud, with the trailer attached to the semi.