Mountain bike legend Keith Bontrager has a quote about wheels that I find appropriate for much in life... "light, strong, or cheap. Pick two". It's great and can be used and reused again and again...
So how can it be applied to the concept of shuttle vehicles (a shuttle vehicle is used to move X+ number of bikes from the bottom of a trail to the top as it's quicker/easier), however they tend to fall into the description, 'reliable, comfortable, or slow', pick two... unless of course you just ignore all that and go with the solution Diamondback Bikes rider Eric Porter has chosen... use a Trophy Truck off-road racer, which has over 800HP!!
The truck in question is the Tonka Off-road Trophy Truck driven by Todd Romano.
Source: Diamondback Bikes / Pink Bike