I was just playing around in the latest dev build and it struck me that I could land a hummingbird on top of another vehicle and it was surprisngly stable to drive around with the helicopter on the roof. I tried the same with a truck and it worked even better.

This struck me as pretty fantastic and I for one would love to see more vehicles interacting with other vehicles in the game. It somehow feels like it would be feasible to do.
I tried loading a car onto a truck but that didn't work, the loaded car was not moving with the truck like the hummingbird was, but it would be pretty cool if it worked.

I did the loading using the new sling loading system which is fantastic by the way. But it feels like this could be built upon with some more features.

This is not fully a "this is what I want" request but just a set of suggestions.
If you as a voter decide to upvote, feel free tell everyone which features you'd like to see from the list.

*load vehicles into trucks (mods might do it, we want it implemented in the vanilla game)

*new truck variety that can load vehicles

*ramps for trucks to load said vehicles

*the ability to secure loaded vehicles or have them secured automaticly to a strict or lesser degree, whichever works best.

*winches to get other vehicles unstuck from terrain

*winches to hoist people up into helicopters or lower them down (expansion on fastropes anyone?)

*ability to load small vehicles inside a mohawk, like a quadbike

*option to open rear door of mohawk from cockpit

*utility trailers for the hemtt that looks like it's compatible with trailers.

Sorry if the suggestions are a bit messy.