(a) From the vehicle speed above 20 mph, any controls for the an excellent nonsteerable axle apart from the two rearmost nonliftable, nonsteerable axles get secure, for all the period. 3.1(b).
(b) At the vehicles rate a lot more than 20 miles per hour, that wheel into one axle otherwise a couple of rims on the any tandem may lock up for all the course.