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TCRP report 155 provides guidelines and descriptions for the design of various common types of light rail transit (LRT) track. The track structure types include ballasted track, direct fixation ("ballastless") track, and embedded track. The report considers the characteristics and interfaces of vehicle wheels and rail, tracks and wheel gauges, rail sections, alignments, speeds, and track moduli. The report includes chapters on vehicles, alignment, track structures, track components, special track work, aerial structures/bridges, corrosion control, noise and vibration, signals, traction power, and the integration of LRT track into urban streets.
By far the greatest proportion of the total cost of maintaining the infrastructure of a railway arises from the track, Modern trains are lighter, travel faster and are much easier to derail than before. Therefore it is vital that track is maintained adequately.This volume shows how railways can be kept running using the minimum necessary maintenance, taking into account the environmental conditions and the type and volume of traffic using the railway.
This three-part report begins a series of studies mandated by Congress under various sections of the Railroad Revitalization and Regulatory Reform Act of 1976 to determine the best means for rehabilitating and revitalizing the nation's railroads. It is produced in accordance with Section 503(b) and is intended to provide a means of classifying the lines of the Class I railroads of the U.S. to serve a number of purposes under the Act. The prime purpose is to categorize the lines according to reasonable measures of priority so that investments in track can be directed where they will do the most good. Standards used by DOT for priority include traffic density, service to major markets, levels of capacity and national defense. Volume I established a preliminary set of categories and designation for public review, and contains three appendices. Volume II has individual line designations by state and a national map. Additions and corrections are in a separate pamphlet.