An alphanumeric Route IndicatorA Route Indicator that conveys its information by illuminated alphanumeric characters. The indicators are designated ‘standard’ and ‘miniature’ as a ref... having medium range (category two)
performance. (Formally known as a Theatre or Multi-Lamp type RouteThe path along a section of track between one Signal and the next, along which an authorised movement is to be made.
Indicator.)