Yard tractor operators faced with snow packed or ice covered freight and distribution terminal facilities can eliminate the need to install conventional tire chains on AUTOCAR Yard Spotter tractors by equipping them with Onspot Automatic Tire Chains kits from Onspot of North America. With the Onspot system, AUTOCAR Yard Spotter tractor operators can engage and disengage chains at the flip of a switch for added traction in forward or reverse.