Final answer:
The capacity of a school purposed vehicle like a van or station wagon for carrying children and/or adults with developmental disabilities typically starts at six or more, subject to local regulations and contract specifics.
Step-by-step explanation:
In response to the question regarding the capacity of a school purposed vehicle for carrying children and/or adults with a developmental disability, there is no universal answer as it can vary based on local regulations and specific contract terms agreed upon by the school board or other authority. However, considering that vehicles such as vans or station wagons are commonly used, it is logical to consider they would typically carry six or more individuals to accommodate space for both passengers and necessary accessibility features.