A woman has been arrested on suspicion of drunk driving after she allegedly drove nearly 20 miles the wrong way on a Washington freeway earlier this week. Police believe that a combination of alcohol and prescription medication contributed to the woman's alleged impairment at the time of the incident.

According to reports from the Washington State Patrol, the alleged drunk driving incident occurred in the early morning hours of Wednesday near Tumwater, which is about 50 miles southwest of Kent. Motorists on Interstate 5 noticed a car traveling north in the southbound lanes of the freeway.

The woman allegedly traveled at speeds ranging from 40 mph to as high as 100 mph during the 17 miles she traveled the wrong way on I-5. She reportedly evaded several spike strips and crashes with oncoming vehicles before coming to a stop near Tacoma. When police approached the woman's vehicle, they found that the woman was "calm" and "had no idea where she was," according to the police report.

Statements made by the woman at the scene reportedly indicated that she had a combination of alcohol and prescription medication in her system. A blood alcohol test allegedly revealed that she was above the legal limit, although police are not reporting the woman's exact blood alcohol content.

Police arrested the Olympia woman for investigation of driving under the influence. She was later charged with DUI. She may also be charged with additional crimes when the investigation into the incident is complete, police say.

There were no accidents or injuries in connection with the incident.

Source: The Seattle Times, "Woman drives 17 miles wrong way on I-5; no crashes," Jan. 11, 2012