A barrier door may include a section including an outer stationary portion and an inner movable portion disposed within the outer stationary portion, an actuator, and a controller. The actuator may move the inner movable portion between different positions to control flow of air between a protective enclosure and a volume outside of the protective enclosure. The controller may monitor one or more operating characteristics of the actuator and may modify an operational status of the actuator to control the flow of the air between the protective enclosure and the volume outside of the protective enclosure based at least in part on the one or more operating characteristics.

A barrier door may include a section including an outer stationary portion and an inner movable portion disposed within the outer stationary portion, an actuator, and a controller. The actuator may move the inner movable portion between different positions to control flow of air between a protective enclosure and a volume outside of the protective enclosure. The controller may monitor one or more operating characteristics of the actuator and may modify an operational status of the actuator to control the flow of the air between the protective enclosure and the volume outside of the protective enclosure based at least in part on the one or more operating characteristics.

A barrier movement assist system aids in the moving of a barrier, the barrier assist system comprising one or more support members; one or more assist devices operatively coupled to the one or more support members, wherein an assist device comprises: a rotational member; and a flexible member operatively coupled to the rotational member and operatively coupled to the barrier; wherein the barrier assist system is configured to aid in opening or closing of the barrier within a frame. A drive system is configured to open and close the barrier, wherein the barrier assist system is configured to aid in the opening or the closing of the barrier. The barrier assist system is configured to reduce an opening speed, reduce an opening acceleration, or increase an opening resistance of the barrier, and is configured to reduce a closing force at which the drive system is configured to close the barrier.

A barrier movement assist system aids in the moving of a barrier, the barrier assist system comprising one or more support members; one or more assist devices operatively coupled to the one or more support members, wherein an assist device comprises: a rotational member; and a flexible member operatively coupled to the rotational member and operatively coupled to the barrier; wherein the barrier assist system is configured to aid in opening or closing of the barrier within a frame. A drive system is configured to open and close the barrier, wherein the barrier assist system is configured to aid in the opening or the closing of the barrier. The barrier assist system is configured to reduce an opening speed, reduce an opening acceleration, or increase an opening resistance of the barrier, and is configured to reduce a closing force at which the drive system is configured to close the barrier.

A driver protection system installed on a public transit unit including a glass portion, a base portion connected to the glass portion, a hinge portion connected to the glass portion and base portion where the glass portion and base portion are made from bulletproof materials.

A driver protection system installed on a public transit unit including a glass portion, a base portion connected to the glass portion, a hinge portion connected to the glass portion and base portion where the glass portion and base portion are made from bulletproof materials.

A driver protection system installed on a public transit unit, the driver protection system including a glass portion, a base portion connected to the glass portion, a hinge portion connected to the glass portion and base portion, wherein the glass portion and base portion are made from bulletproof materials and/or non-ballistic materials.

A driver protection system installed on a public transit unit, the driver protection system including a glass portion, a base portion connected to the glass portion, a hinge portion connected to the glass portion and base portion, wherein the glass portion and base portion are made from bulletproof materials and/or non-ballistic materials.

A driver protection system installed on a public transit unit, the driver protection system including a glass portion, a base portion connected to the glass portion, a hinge portion connected to the glass portion and base portion, wherein the glass portion and base portion are made from bulletproof materials and/or non-ballistic materials.

A driver protection system installed on a public transit unit, the driver protection system including a glass portion, a base portion connected to the glass portion, a hinge portion connected to the glass portion and base portion, wherein the glass portion and base portion are made from bulletproof materials and/or non-ballistic materials.