More than 69,000 people were charged for driving further than they did on the turnpike. The mistake was just found by officials.
A computer glitch is being blamed for overcharging customers over the course of several days.
From November 21st to approximately November 28th, the turnpike authority had a glitch that caused transactions to be reported in error.
Jack Damrill, with the Oklahoma Turnpike Authority, says in some cases drivers were charged for two trips when they only took one.
"Just one single trip occurred so what we had to do is actually go back and see the trip that actually occurred," he said.
Damrill says the incorrect charges will vary from customer to customer.
"So it just depends on how many number of times they took that trip or trips during that time period," he said.
Those affected have been notified by email and the correction will be on customers' December statements.
The Oklahoma Turnpike Authority has fixed the glitch and put additional safe guards in place to prevent this from happening again.
"There are some 36 toll agencies across the nation and we haven't heard of this happening," Damrill said.
The Oklahoma Turnpike Authority is already starting to credit peoples accounts and the correction will appear on customers December statements.