This document discusses an Assy Rail Tracking Carrier model UCT 15. It can carry 4 passengers or 2 passengers with spare parts. The advantages of the UCT 15 model are that it has more balanced rail tracking than a single rail, and is easy to maintain, operate, and is locally fabricated. It also operates using 380 VAC, 3 phase, 50 Hz power and can be used in tunnels with different surface angles and heights.