The sign that once read "Arline" on the northbound exit 53 on the North Freeway near Crosstimbers Road has now been updated with the corrected spelling of the street.
Commuters in the area said that the sign on I-45 for the Airline Drive exit was missing the letter 'I' for weeks.
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TxDOT officials said Saturday they were made aware of the error and workers were able to correct the erroneous sign Saturday night.
A spokesperson for TxDOT told ABC13 they were not sure who was responsible for the mistake, but they were investigating how procedures meant to ensure accuracy failed in this case.
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TxDOT, the state's massive transportation agency, regulates and maintains hundreds of thousands of signs of all sizes along interstate, U.S. and state highways.
There have been similar mistakes in the past, including a 2020 error when sign makers flipped two letters on a Guadalupe River sign near Cuero, spelling it "Gaudalupe."
"Nice new bridge in Cuero," James Keith wrote on Twitter at the time. "Can you find the one mistake?"
TxDOT's social media team was happy to answer Keith's inquiry in good humor.
"Thank u fer brengin this too our attension," the agency tweeted. "Were gunna fix it as soon as posibul!"
Officials said they welcome the traveling public to let them know if they see issues with highway signs.