Actually - I have a background in Aerodynamics... The design philosophy adopted by this concept is of that of the Hummer. A more aerodynamic shape would have steeper rear and must have a front that looks like a dam... This is good for vectors traveling under 160 kph.
I have some other concepts which is not really for Philippines - I will post it anyway for your reference.
Beside - the angle of the windshield was intentionally made more erect so as to provide more space. THe motto is "Space for Sale"...