Final answer:
The area described is called a van-accessible aisle, designed to accommodate the side-loading and unloading of wheelchairs from accessible vans.
Step-by-step explanation:
The area described in the question, which is 60 inches wide and located adjacent to accessible parking spaces, is called a van-accessible aisle. This specific area is designed to accommodate the side-loading and unloading of wheelchairs from accessible vans.
It provides the necessary space for a wheelchair lift or ramp to be deployed, allowing individuals with disabilities to safely enter or exit the vehicle.