6. Conclusion
Friction control at the wheel-rail contact has improved considerably since the widespread use of variable-speed electric drives combining AC traction motors, sensors, microprocessors and on-board computers, linked by local computer networks.
At both ends of the effort-speed plane, in both traction and braking, grip is the fundamental issue: it enables increased towed loads and acceleration, as well as shorter stopping distances.
For the same stopping distance, improved grip means higher average commercial speeds. The profitability of rail transport and its low energy costs depend on it.
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Conclusion
References
Standardization
NF A 45-317 April 1982 Hot rolled. Vignole rail type 60 kg/m and splice bar. Profile: characteristics and tolerances.
NF F 01-115 October 1994 Railway rolling stock. Profiles for normal track. Characteristics.
UIC 615 c see ref. ...
Recent theses
Please refer to .
Manufacturers-Suppliers (non-exhaustive list)
Faiveley Transport
Alstom Transport
http://www.alstom.com
SNR
Organizations
UIC International Union of Railways
ORE UIC Research and Testing Office
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