[Imp]

A further note on carry capacities. Desperate times means desperate measures the vehicle might only carry 2 but if it saves your life you are going to risk falling off.
If the game code allowed people should be able to ride on the outside of APCs, or even cleverer if go over rough terrain riders might take casulties depending on speed.

When I was young (&stupid?) in Thailand we hitched a lift on a lite van, 4 of us standing on the bumper hanging onto the drainage channels & ariel of all things.
I am still alive & it beat walking 3 miles
People hanging off vehicles was common out there.
Buses if full you ride the roof rack or bumper, has handles & they only slow down to let you off as on a timetable & get docked pay if late.
With practice you can jump from a vehicle doing 15-20mph & stay on your feet, the trick is to start running before you hit the ground & lean into it.