braking frequency
61Wheel motor — The wheel motor (also called wheel hub motor, hub motor or in wheel motor ) is an electric motor that is incorporated into a wheel and drives it directly.Uses* Wheel motors are applied in industry, driving e.g. wheels that are part of assembly… …
62Communications-based train control — CBTC deployment in Metro de Madrid, Spain …
63Tram — A tram, tramcar, trolley, trolley car, or streetcar is a railborne vehicle, of lighter weight and construction than a train, designed for the transport of passengers (and, very occasionally, freight) within, close to, or between villages, towns… …
64Risk compensation — In ethology, risk compensation is an effect whereby individual people may tend to adjust their behavior in response to perceived changes in risk. It is seen as self evident that individuals will tend to behave in a more cautious manner if their… …
65Car accident — A car accident is a road traffic incident which usually involves one road vehicle colliding with, either another vehicle, another road user, or a stationary roadside object, and which may result in injury or property damage. Terminology Phrases… …
66London Underground infrastructure — The infrastructure of the London Underground includes 11 lines, which serve 268 stations by rail. Lines on the Underground can be classified into two types: subsurface and deep level. Lines of both types usually emerge onto the surface outside… …
67Blocco Automatico a Correnti Codificate — BACC is a train protection system used in Italy on high speed lines (lines with a top speed of 200 km/h or more). The term is an abbreviation of Blocco automatico a correnti codificate ( automatic block system with codified currents ).It is an… …
68aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the …
69Protective relay — See also: Power system protection In electrical engineering, a protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers …
70Amtrak — For other uses, see Amtrak (disambiguation). Amtrak Map of the Amtrak system (2007) Reporting mark …
