Fig. 4. Cady Traffic Simulator "foot" construction. (A) Angle iron (9.5 mm thick, 15.2 cm wide) fastened to piece of tire using four 8.0-mm carriage bolts and stop nuts, (B) piece of tire (45.7 cm long by 15.2 cm wide) looped with tread side out (preferably 8-ply, load range D), (C) steel plate fastened to piece of tire using four 8.0-mm carriage bolts and stop nuts, and (D) bottom view of steel plate, showing four carriage bolts with stop nuts and three screw-in cleats.