system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some vehicles (certain busses, semi trucks, etc) have completely flat front ends? Isn't this the last aerodynamic shape possible without getting concave?
gpt
A lot of vehicles prioritize length and internal volume over aerodynamics. A bus operator for example wants to be able to fit the maximum number of people in his buses, while still staying under the total allowable length for a bus.