I… actually really like that solution. The whole shopping cart/handcart idea is pretty appealing. It’d be nice to be able to load a pile of stuff into a cart so you can move around more stuff than you can normally carry. Sort of serving the role of car trunks without needing to worry about gasoline (and without the added speed).
Having to abandon a bunch of gear in a cart because the cart is slowing you down and you’re being chased by zombies would make for one of those rough sacrificial decisions that Cata could always use more of.
I think it’d actually be kind of nice to be able to push vehicles around (perhaps tied to your strength) in a limited (extremely slow) capacity. At least for smaller cars it’s not that hard to get them rolling on a flat road. I’d just make it more likely to lose control of the car and preferably, if/when a ‘weariness’ or ‘endurance’ system gets added, this would be extremely draining making it hard to do over more than a relatively short distance… But I think it’d be nice to be able to push dead cars (with tires) off of roads, for example. Without having to ram them. Or pushing it down the road to a nearby gas station because you ran out before you could make it. Or even pushing dead cars around to form obstacles, blocking off alleys and roads (makeshift barricade) and forcing zombies to crawl over them, slowing them down.