The unique aspect of Thimphu roads and the traffic control over the road network is that it is one of the two national capitals in the world that does not have traffic lights (the other is Ngerulmud, Palau). Local authorities had installed a set of lights but before they became operational the lights were removed. Instead of traffic lights, the city takes pride in its traffic police that directs the oncoming traffic with their dance-like movement of their arms and hands. City Bus services operate throughout the day. There are plans to introduce tram services in the city.