The Ohio Supreme Court will hear a city's challenge to new rules that require a police officer to be present when an automated camera is used to issue traffic tickets.
Springfield's argument against the law was rejected by a county judge last year and the city lost an appeal earlier this year. Nearby Dayton also has an appeal pending before the state's highest court.
The state court will consider Springfield's case on two points, covering whether a local ordinance that establishes an automated system for enforcement of statewide traffic laws is a valid exercise and whether cities must comply with a statute that limits municipal authority.
The state Attorney General's Office says it will respond to the litigation in court.
The court has upheld municipalities' camera enforcement in earlier cases.