What is one characteristic feature of a bobtail truck?

A bobtail truck is distinctly characterized by having a significantly shortened back end. This design typically means that the truck is a tractor unit without a trailer, which allows for increased maneuverability in tight spaces and makes it ideal for urban deliveries and other applications where length is a limitation. The compact design helps in making efficient use of road space and can also enhance the vehicle's stability during operations.

The other options, while they may pertain to different types of trucks or specific functions, do not correctly describe the defining feature of a bobtail truck. For instance, larger payload capabilities or a full truck bed may relate more to other configurations that are not inherently defined by a shortened back end. Similarly, a focus on passenger transport would typically describe vehicles designed for that specific purpose rather than a bobtail configuration, which is primarily known for its hauling versatility rather than passenger capacity.