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Fig. 4. The functions
h
(
t
)
, the renewal density of grindable and non grindable rail
defect
Fig. 5. The functions
h
(
t
), the renewal density of grindable and non grindable rail
defect
by a train and and, either position 4, traducing the occurrence on a rail
replacement operation. The probability to over run a BR is 10 to 100 times
higher with AC has with TC. We have to assume the risk of derailment on
BK, the not respect of the legal requirement to be “GALE” (Globally At
Least Equivalent), if we use AC alone. These results can be used to calculate
the yearly costs taking into account all the factors, in particular for the rail
and the signalling maintenance. In this case, other factors such as RAMS of
equipment (e.g. transmitter/receiver of TC, axle counter itself) contribute to
their cost.
