The Belkommunmash BKM-321 is a Belarusian large capacity low-floor trolleybus for intracity passenger transportation, mass-produced since 2003.

This model of trolleybus is used in many cities of Russia, Belarus, Ukraine, Kyrgyzstan, Latvia, Moldova, Transnistria and Serbia.

The side mirrors are of a spherical type, equipped with anti-reflection coating and electric heating.

The buses are equipped with a pneumatic system for remote removal of the poles from the wires of the contact network.

In addition to providing softness, this enables the floor to be lowered at bus stops to facilitate the entry of persons with disabilities and passengers with prams.

The interior floor is of bakelized plywood with a thickness of 12 millimeters (0.5 inch), which is attached to the base body.

Vertical rails can be equipped with buttons to signal the driver to stop the bus on demand.

The dashboard of the bus is made in the form of semicircles, which provide the driver with quick access to all necessary controls.

In the middle panel is a large round speedometer (German, VDO) with electronic odometer.

To the right and left of the exemplary devices are keys for opening and closing the doors, turning on the alarm, and controlling the direction of movement of the bus.

To the left of the driver is an additional side panel, on which is placed the hand brake lever, similar to a joystick control system.