The accident happened at 6.15am on Udon Thani-bound Mittraparp road in Tambon None Sung in Muang district. 
Chanisara Kongsombat, 31, died behind the wheel with severe head injuries. 
A witness told police he had seen a car driving fast and plunging into a pond without slowing down. 
Noosamai Kongsombat, 56, said her daughter, Chanisara, had to see doctors regularly after she had suffered a stroke, adding that she had awoken at 4am to drive to see her doctor on her own because she has divorced.

Stroke victim killed in car crash while driving to Udon Thani hospital

A woman was killed when her car plunged into a roadside pond in Udon Thani’s Muang district on Tuesday morning while she was driving to see her doctor, police said.