THE TREND OF DEVELOPMENT IN THE DESIGN AND EQUIPMENT OF UNDERGROUND RAILWAYS.

Keywords: BOARD OF TRANSPORTATION (NEW YORK), DEVELOPMENT, DESIGN, EQUIPMENT, UNDERGROUND, RAILWAYS, STATISTICS, ELECTRIC, SYSTEMS, CONSTRUCTION, ALIGNMENT, TUNNELS, LINES, CAPACITY, DEPTH, SCHEDULES, SPEED, STATIONS, TRACK, DEICING, TECHNICAL, ROLLING STOCK, PERFORMANCE, PLATFORMS, SUBWAYS, CAST, IRON, VENTILATION, INTERCHANGES, PNEUMATIC, COSTS, EQUIPMENT, FAILURES, PASSENGERS, SIGNALS, RELAYS, CABLES, SAN FRANCISCO, STOCKHOLM, LONDON, GLASGOW, PARIS, BERLIN, USA, SWEDEN, UK, FRANCE, GERMANY