Was browsing the workshop and surprised that nobody has made any attempt at a vehicle mod, I figured with some maps having the survivors walking 1/4 of the day to observe something or salvage a spacewreck it would have been obvious.

I figure it could be you build a vehicle, assign it to a survivor like a mech, then if they have a task that's further away than say 50 tiles and their vehicle is closer, they get in/on their vehicle and drive it to their location, get out of it and do their task. Tier 1 could be bikes (physical), Tier 2 as ATV/motorcycles/dune buggies (fuel), and Tier 3 as hovercycles/other sci-fi vehicle (power cells). The Tier 2/3 options could also have mounted weapons for combat.

Alternatively, maybe have the tamable large animals capable of being ridden by a survivor with a high enough ranching skill.