A track assembly includes a track, a transmitter unit, a support member, and a receiver unit. The transmitter unit may be connected to the track, and/or the support member may be configured for connection with the track. The receiver unit may be connected to the support member and/or may be configured to receive light from the transmitter unit. The track assembly may include a first electronic control unit that may be connected to the transmitter unit. The first electronic control unit may be configured to control the transmitter unit. The transmitter unit may include a light source, and/or the transmitter unit may be configured to transmit light from the light source into the track. The transmitter unit may be configured to transmit visible light and/or non-visible light. The track assembly may include a second electronic control unit.