A woman driver may have suffered a medical emergency just before she crashed while headed south on Highway 101 into Santa Rosa Tuesday morning, according to the CHP.

Witnesses told CHP the woman was weaving and hitting the center divider multiple times before she crashed, said CHP Officer Kerri Post.

The woman and her 15-month-old boy were taken to Santa Rosa Memorial Hospital after the 10:30 a.m. crash, which occurred near Mendocino Avenue in northern Santa Rosa.

Other drivers stopped and banged on the driver's window but the woman didn't respond, said Post. The driver reportedly remained unconscious hours after the crash.

The woman's name wasn't initially available as it hadn't been confirmed, but Post said she was believed to be a 20-year-old Ukiah resident.

The fast lane was blocked temporarily by emergency vehicles.