Keying in on the word 'require', it is possible to walk from the Rental Car Center to the terminal on paved sidewalks. It is a bit of a circuitous route and I don't recommend it, but it's definitely possible.



There's a shorter route if you (and the police) don't mind walking along the edge of a road without a sidewalk.

The Sunport is quite pedestrian friendly. I've walked from the airport to a nearby hotel rather than wait for a shuttle on more than one occasion.