COLUMBUS, Ohio (AP) - The Ohio Senate has begun considering a measure that would ban authorities from using cameras to determine whether drivers run red lights or violate speed limits. The Senate started its hearings Tuesday. The House passed the measure in June. It would allow the cameras only in 20-mph school zones if a law enforcement officer is on hand. Some police and city officials say the cameras improve safety and traffic-monitoring efficiency. But camera opponents allege the devices are used to raise funds and say the bill could help end such abuse. A case involving a southwest Ohio village has boosted the push for a statewide ban. After a speeding ticket blitz, a judge blocked Elmwood Place from using the cameras to catch speeders. The village has appealed.Northwood City Counvil voted in July not to renew its contract with the company that operates the city's red light camera. No traffic tickets have been issued since its contract expiration.