both-way signalling
81Ffestiniog Railway — Heritage Railway name = Ffestiniog Railway caption = Two trains passing at Tan y Bwlch, c. 1900 locale = Wales terminus = Porthmadog linename = Festiniog Railway Company builtby = Festiniog Railway Company originalgauge = RailGauge|23.5… …
82Red Line (MBTA) — RED LINE An MBTA Red Line train composed of #3 Red Line stock leaving Charles/MGH station bound for Alewife, going over the Longfellow Bridge …
83Automotive lighting — Blinker redirects here. For other uses, see Blinker (disambiguation). Not to be confused with Magneti Marelli company AL Automotive Lighting. For lights in seafaring and aviation, see navigation light. The lighting system of a motor vehicle… …
84History of primitive and non-Western trumpets — The chromatic trumpet of Western tradition is a fairly recent invention, but primitive trumpets of one form or another have been in existence for millennia; some of the predecessors of the modern instrument are now known to date back to the… …
85animal communication — Transmission of information from one animal to another by means of sound, visible sign or behaviour, taste or odour, electrical impulse, touch, or a combination of these. Most animal communication uses sound (e.g., birds calling, crickets… …
86London Underground — Infobox Public transit name = London Underground The Tube |thumb|Official logo. imagesize= 150px locale = Greater London, Chiltern, Epping Forest, Three Rivers and Watford transit type = Rapid transit began operation = 1863 system length = 400 km …
87Loading gauge — The clearance between train and tunnel is often small. London Underground train at Hendon. A loading gauge defines the maximum height and width for railway vehicles and their loads to ensure safe passage through bridges, tunnels and other… …
88Digital Access Carrier System — (DACS) is the name used by British Telecom (BT Group plc) in the United Kingdom for a 0+2 Pair gain system. Two Telspec DACS remote units mounted on a pole Contents 1 Usage …
89Three Bridges to Tunbridge Wells Central Line — The Three Bridges to Tunbridge Wells Central Line was a railway line running from Three Bridges (on the Brighton Main Line) in West Sussex to Tunbridge Wells Central in Kent via East Grinstead in East Sussex, a distance of… …
90Amtrak — For other uses, see Amtrak (disambiguation). Amtrak Map of the Amtrak system (2007) Reporting mark …
