Page 142 - 360.revista de Alta Velocidad - Nº 5

Grande, Zacarías. Blanco López, Marta. García Tamames, Alberto. Castillo, Enrique.

8. Plot the trace of the line with the location of the most risky items.

9. Provide tables with the circumstances that produce the most risky incidents in order to
address the corrections to the real circumstances.

2.5.1 Necessary Information

The software for the probabilistic safety analysis (PSA) needs the following elements of infor-
mation or input data:

1. Railway regulations to be applied.
2. Line description. A detailed description including the location and characteristics of
switches, signals, level crossings, tunnels, viaducts, curves, etc.
3. Driver’s booklets. With the characteristic safety regulations for each train and line
including detailed maximum speeds, timing, etc.
4. Train characteristics. Power, maximum speeds, lengths, maximum accelerations and
decelerations, etc.
5. A video taken from the cabin in both directions. These two videos are very important to
identify risks and make decisions about the line safety.

Each element must be modeled properly by providing a line of code with the corresponding
information, as shown below:

‘Underpass’, 370.35,’T’, ...
‘AnnouncementP’, 375.0, 0, 85, ...
‘AnnouncementGradeCrossing’, 376.0, ‘P’,2,...

‘SignalP’, 376.105, 1, 85, ...
‘CurveIn’, 376.215, 350,’R’, ...
‘GradeCrossing’, 376.350,’P’, ...

‘SignalA’, 378.2, ...
‘AnnouncementGradeCrossing’,379.765, ‘P’,1,..
‘CurveOut’, 379.768, 350, ...

‘SignalFP’, 379.775, 0, 85, ...
‘GradeCrossing’, 380.7,’P’, ...
‘ContinuousOFF’,380.85, ...

3. Examples

Next, several examples of application are presented to illustrate the possibilities of the
proposed methodology. In particular, the safety problems are identified and resolved with a

140 360.revista de alta velocidad