welll, why not simply:

1.) instlall some sort of sonar that permanently scans the ground in a 50-100 meter radius and automatically slows down speed when getting to close to a "hole"/edge

or

2.) as this is the future: some emergeny-hover device, like a bunch of air dischargers on the lower side of the buggy? Once you drive over an edge, air is being discharged (like they use for any maneuvers in space) and lets the buggy fly for a very limited amount of time, enough to have it reach safer grounds again.

since this is muttaīs only chance to get back to an astronautīs life, it has to be something flashier/more awesome than just instructions of behavior