Why buses do not have streamlined shape?

Buses do not have a streamlined shape primarily due to their design requirements for passenger capacity and interior space. The need to accommodate a large number of seats and standing room necessitates a boxy, flat shape, which maximizes usable space. Additionally, buses operate at lower speeds compared to vehicles like cars or airplanes, where aerodynamics play a more critical role in fuel efficiency. Consequently, the trade-off between passenger capacity and aerodynamic design results in the traditional bus shape.