(La Porte County, IN) - A woman allegedly drove 20 miles on a flat tire at a high rate of speed before crashing near Westville.

31-year old Sara Coetzee is charged with operating while intoxicated.  According to police, another driver saw her traveling on a flat tire on the Indiana Toll Road in Portage about 6:30 a.m. on Sunday.   It was very foggy when she crashed through a toll plaza gate at the Westville exit.  Police say she was traveling U.S 421 still at high speeds when her Jeep overturned near Indiana 2. 

The Valparaiso woman was not injured.  Her alleged blood alcohol level was just under two times the legal limit.