During authorized activity trips, what is the highest speed limit a school bus can travel?

During authorized activity trips, the highest speed limit a school bus can travel is 50 mph. This regulation is in place to ensure the safety of the children and other road users when school buses are not operating on regular school routes. The speed limit considers the bus's size, weight, and the additional responsibility of transporting students.

While higher speeds might be permissible for other vehicles on the road, school buses are specifically bound to these lower limits to promote caution and care, especially in areas where they may be picking up or dropping off children. Lower speed limits help accommodate potential sudden stops and the careful navigation often required when students are involved.

The other options suggest higher speed limits which do not align with the designated regulations for school bus operation during these trips.