By CBS13 Staff

GALT (CBS13) – An Elk Grove man was killed in a crash along Highway 99 in Galt late Thursday morning, authorities say.

California Highway Patrol says the crash happened around 11:50 a.m. along the northbound side of Highway 99, near Simmerhorn Road.

A minivan was reportedly driving on the shoulder for a few hundred feet at over 90 mph when it crashed into the back of a parked big rig.

The driver of the minivan – a 42-year-old Elk Grove resident – was killed in the crash, CHP says. Officers say he was not wearing a seatbelt.

The big rig driver, who was not hurt in the crash, reported that he had stopped to deal with a medical emergency related to ulcers.

Authorities have not yet released the name of the driver killed.