RSSB GC/RC5521 : ISSUE 1 AMD 1 2013

Part A
Issue Record
Technical Content
Responsibilities
Health and Safety Responsibilities
Supply
Part B
1 Purpose
2 Scope
3 Definitions
4 Documents Supported by this Document
5 Background to Calculation Methodology Presented in this Document
6 Units and Conventions
7 Conditions Under which Trains May Travel at an Enhanced Permissible Speed
8 Where Enhanced Permissible Speeds are to be Calculated
9 Factors Common to Calculation of Permissible Speeds
10 Factors Particular to Calculation of Enhanced Permissible Speeds
11 Method of Calculating Enhanced Permissible Speeds
12 Tolerable Probability of Overturning
13 Enhanced Permissible Speed to be Displayed
14 Enhanced Permissible Speeds through S&C;15 Procedure for Calculating Enhanced Permissible Speeds
16 Records of Calculation of Enhanced Permissible Speeds
17 Review of Enhanced Permissible Speeds
Appendices
A - Diagrams Illustrating Issues Discussed in Section 5
B - Control of Radius Using Fixed Datum Points
C - Reference Wind Speed
D - Local Wind Speed
E - Wind Direction Probability Factor, P[D]
F - Aerodynamic Cant Deficiency Coefficient
G - Overspeed Probability Distribution with No Speed Supervision System
H - Summary of Recommended Method of Calculating Enhanced Permissible Speeds
J - Calculating the Probability of Overturning for a Single Train Pass Through a Curve
References

Includes recommendations that are applicable to the duty holders of the infrastructure controller category of Railway Safety Case.