What is the maximum length for a bus on any primary highway?

Answer: B — 45 feet

The maximum length for a bus on any primary highway is established to ensure safety and maintain effective traffic flow. In Missouri, regulations state that a bus can be up to 45 feet long on primary highways. This measurement accommodates the design and maneuverability of buses while still adhering to safety standards. Longer buses can pose challenges when it comes to turning radius and navigating in urban or congested areas; hence there is a limit set. By allowing a maximum length of 45 feet, the infrastructure can support larger bus sizes, promoting public transport efficiency without compromising safety or traffic management on the highways.