What makes a 'rough terrain' crane different from an 'all terrain' crane?
RT cranes have one cab (operator's cab is also the driving cab), four large equal-size tires, and rated speeds on the order of 25-30 mph — they're transported between sites on a trailer. All-terrain (AT) cranes have a separate driving cab, multiple axles, and can drive at highway speeds. Both inspect to 1926.1412.