| GCat | Transportation Modes |
| MCat | Rail |
| SCat | Track Structure Design |
Railroad track structure system design. Rail traffic loadings. Mechanical properties of track components.
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Hot Topics: Transportation Design
Alternative Rail Intruder and Obstacle Detection Systems ![[pdf]](graphics/file_pdf.gif)
[31880] 
[31880] Summary of systemst hat provide information on the status of sections of railroad track and crossings.
Intelligent Transportation Systems/Positive Train Control at Highway-Rail Intersections [31881]
[31881] Safety benefits with intelligent transportation systems and positive train control at highway-rail intersections.
Railroad Track Standards [32379]
[32379] A manual of US Army and Air Force railroad track system requirements
Use of Guard/Girder/Restraining Rails [30622]
[30622] To improve vehicle curving performance, to reduce risk of flange climb derailment, and to control wheel and rail wear.
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