(a) School bus drivers shall stop school buses in the right-hand traffic lane at loading points where school children cross the highway in the process of loading or unloading and at loading points where the shoulder of the road is so narrow that pulling to the shoulder is unsafe or impractical.
(b) At loading points where no children cross the highway in the process of loading or unloading and where there is a sufficient and safe area at the right to remove the school bus completely from the highway, school bus drivers shall remove the school bus from the highway for loading or unloading.