Final answer:
Vehicles on multi-lane highways do not have to stop for school buses when lanes are separated by a raised barrier, as it provides sufficient separation of traffic directions.
Step-by-step explanation:
Vehicles driving on a multi-lane highway with lanes going in the opposite direction are not required to stop for school buses if the lanes are separated by a raised barrier. This is designed to provide a physical separation between traffic directions, creating a safer environment for vehicles to continue without the need to stop for school buses that are loading or unloading children. When highways have configurations like a two-foot-wide unpaved median, left/right turn lane, or a reversible lane, they typically do not provide the same level of separation as a raised barrier, and the laws regarding stopping for school buses can vary.