They're not "scattered through-out our cities" in Ohio. In fact, speed cameras are only being used in a couple areas, including Cleveland and Heath, because while red-light cameras have been cleared through the courts, the legality of SPEED cameras in Ohio is still very much in doubt. Ohio traffic enforcement laws require a police officer to be in "plain sight" while monitoring traffic for enforcement purposes. This means the entire cruiser has to be visible to people traveling the road the officer is monitoring. There is also a provision in Ohio law that only the WITNESSING officer can write a traffic ticket. AND only a FULLY MARKED cruiser can initiate a traffic stop. All of this stacks up to make speed cameras a highly contested issue in Ohio.
BTW, all of this is one reason I will never set tire inside the city limits of Heath. If I ever receive a speeding ticket through a camera, it will be a pile of scrap by the end of the day. They're a violation of the Constitutionally guaranteed right to face one's accuser.