SPRINGBORO, Ohio — The driver of a special-needs school bus here was arrested and charged with driving while intoxicated on Dec. 19.

That morning, Springboro police responded to a call that a school bus was being driven erratically. Police gave the driver, Sherry Callahan, a Breathalyzer test, and she reportedly registered at about 0.05% blood alcohol content.

Springboro Community City Schools officials said that there were a "limited number of students on the bus," and that they were then taken to school safely and their parents were notified immediately.

“Student safety is paramount,” district Superintendent Todd Petrey said on the day of the incident. “It is our number one concern. ... I want to assure our community that we take this morning’s events very seriously and will do all we can to assure the safety of our students each and every day.”

Petrey said that the incident was undergoing a thorough investigation and that the school bus driver would not drive a Springboro Community City Schools bus during the investigation. The next day, the driver resigned.

The district employs more than 60 drivers. Petrey highlighted the drivers' experience and the transportation operation's commitment to safety.

“Our top 15 drivers combine to have more than 219 years of experience driving school buses," he said, "and we pride ourselves on running a very safe, effective bus system for more than 5,000 local students.”

Fox 45 reported that Callahan appeared before a judge on Monday and pleaded not guilty. The next step in the case is a pre-trial hearing.

Other recent news on impaired driving:

• Newfoundland bus driver charged with impaired driving