US standards / railway associations
AREMA
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- AREMA is the American Railway Engineering and Maintenance-of-Way Association
- AREMA provides specifications, standards and guidelines for wayside infrastructure (tracks, bridges, etc.)
- The standards, guidelines and recommended practices are issued for the whole lifecycle (design, construction, maintenance and inspection)
AAR
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- AAR is the Association of American Railroads
- represents the railroad industry, mainly freight operators
- represents the operators, not the manufacturers
- there is a term called "AAR market" when referring to products suitable for those operators