24.07.2007, Crown City, Ohio, United States of America - A line of trucks on a highway. (USA, United States of America, United States, America, American, North America, North American, Ohio, Crown City, highway, motorway, freeway, four-lane freeway, four-lane motorway, street, road, lane, mutlilane, mutli-lane, line, queue, traffic density, traffic-jam, cars, truck, trucks, motor vehicle, traffic, heavy goods vehicle, lorry, lorries, vehicle, tank lorry, tank truck, tankers, semi-trailer truck, semitrailer truck, tractor-trailer, articulated truck, articulated lorry, artic, articulated vehicle, long, big, load, transport, forward, forwarding, freight forwarding, ship, shipping, driving, drive, roadwork, roadworks, repair, build, building, impediment, slow, slowing, ecology, environment, environmental, environmental issues, green issues, emission, emissions, exhaust emission, carbon dioxide, CO2, polluting, pollute, pollution, air pollution, fuel, fuel consumption, consumption, outdoor, outdoors, horizontal) 00P070724D431CAROE.JPG [MODEL RELEASE: NOT APPLICABLE, PROPERTY RELEASE: NO (c) caro images / Muhs, http://www.caro-images.com, [email protected] - In case of using the picture for any non-editorial purpose, please contact the agency - the picture is subject to royalty!]