Enclosure for a vehicle system

A barrier door for a protective enclosure within a vehicle, the barrier door comprising:

• a hinge structure configured to couple the barrier door to an interior partition of the vehicle permitting rotation of the barrier door within an aisle of the vehicle;
• a lower section;
• and
• an upper section, comprising:
• a stationary portion;
• and
• a movable portion movable between a lowered position at least partially within the lower section and a raised position adjacent the stationary portion, wherein the stationary portion is configured to guide and support an edge of the movable portion as the movable portion extends above the lower section toward the raised position;
• a lift device disposed in the lower section and configured to move the movable portion between the lowered position in which the inner movable portion is at least partially withdrawn into the lower section to form an opening in the upper section and a raised position in which the inner movable portion is extended to close the opening.

A barrier door for a protective enclosure, the barrier door comprising:

• a hinge structure configured to be installed within an interior volume of a vehicle such that the barrier door can rotate through an aisle of the vehicle;
• a lower section;
• and
• an upper section comprising a stationary portion and a movable portion disposed adjacent to the stationary portion, wherein the stationary portion comprises a guide configured to support a forward edge of the movable portion as the movable portion extends above the lower section;
• wherein the movable portion is movable in a vertical direction and is coupled to a lift device configured to move the inner movable portion between a lowered position in which the inner movable portion is at least partially withdrawn into the lower section to form an opening in the upper section and a raised position in which the inner movable portion is extended to close the opening.