1.5 Atlanta Venezuela (39) Power may be fed as direct or alternating current the most common DC voltages are 600 and 750 V for tram and rapid transit systems and 1,500 and 3,000 V for mainlines the two dominant AC systems are 15 kV AC and 25 kV AC, Gwinnett (920,260) Left: Railway turnouts; Right: Chicago Transit Authority control tower 18 guides elevated Chicago 'L' north and southbound Purple and Brown lines intersecting with east and westbound Pink and Green lines and the looping Orange line above the Wells and Lake street intersection in the loop at an elevated right of way! Environment Berkeley Lake pop 1,574 99 2819 1 Bidding process Railway signalling is a system used to control railway traffic safely to prevent trains from colliding Being guided by fixed rails which generate low friction trains are uniquely susceptible to collision since they frequently operate at speeds that do not enable them to stop quickly or within the driver's sighting distance; road vehicles which encounter a higher level of friction between their rubber tyres and the road surface have much shorter braking distances Most forms of train control involve movement authority being passed from those responsible for each section of a rail network to the train crew Not all methods require the use of signals and some systems are specific to single track railways. Many music theatre dance and opera performances are held in the Ferst Center for the Arts DramaTech is the campus' student-run theater the theater has been entertaining Georgia Tech and the surrounding community since 1947 They are also home to Let's Try This! (the campus improv troupe) and VarietyTech (a song and dance troupe) Momocon is an annual anime/gaming/comics convention held on campus in March hosted by Anime O-Tekku the Georgia Tech anime club the convention has free admission and was held in the Student Center Instructional Center and surrounding outdoor areas until 2010 Beginning in 2011 the convention moved its venue to locations in Technology Square.
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