speed signalling
91Regional Fast Rail project — The Regional Fast Rail project was a State Government initiative in Victoria, Australia, to decrease travel times on parts of the Victorian regional railway network. Launched on September 5 2000, the project involved the upgrading of tracks… …
92North Downs Line — Overview Type Suburban rail, Heavy rail System National Rail …
93Automotive 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… …
94Delhi Metro — दिल्ली मेट्रो Info Locale NCR, India (Delhi, Gurgaon, Noida) …
95Loading 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… …
96Train stop — Part of a railway signalling system, a train stop or trip stop (sometimes called a tripper ) is a train protection device that automatically stops a train if it attempts to pass a signal when the signal aspect and operating rules prohibit such… …
97Railway semaphore signal — One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted arm . Semaphore signals were patented in the early 1840s by… …
98Asynchronous serial communication — describes an asynchronous, serial transmission protocol in which a start signal is sent prior to each byte, character or code word and a stop signal is sent after each code word. The start signal serves to prepare the receiving mechanism for the… …
99Passing loop — Trains in a passing loop A passing loop (also called a passing siding, crossing loop, crossing place or, colloquially, a hole) is a place on a single line railway or tramway, often located at a station, where trains or trams in opposing… …
100Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …
