June 2017 saw the annual event of Trooping the Colour take place on The Mall in Westminster. Before the event can begin traffic signals must first be removed to allow room for the parade.
This process has been simplified since Transport for London installed the NAL Retention Socket for the quick and straightforward removal and reinstatement of traffic signal columns. The traffic signals have also been cabled with the NAL IP68 Plug and Socket creating an efficient, fully demountable system. On the morning of the parade, with the road closed, civils workers can begin demounting and within 30 minutes three NAL Demountable sites were cleared for the parade.
Power to the signals is isolated from the nearby controller allowing the workers to disconnected the plug and socket cables. With only a key and spanner the columns are then released and removed from the Retention Socket and stored on a truck where they are kept until the event reaches its end. Once the Mall is cleared the workers return to reinstate and reconnect the signals, ready for normal operation to continue.