Consider a 100 km single track line segment between two
stations, divided into 10 track segments of equal lengths,with
meeting stations between each track segment.To demonstrate
how the benefit of an investment may vary depending on time
table assumptions in the CBA,we will now apply the model setup
in the previous section to compute the benefit of a suggested
capacity extension on this track line segment.The example is
realistic but simplified. Parameter values are adapted from the
Swedish appraisal guide lines and given in Table 1.
Assume that there is only one train type,with a minimum
traveltime of T¼40 min on the line segmentand Tk¼4 min on the
track segments.Assume that there is initially n¼4 trains within a
time period S¼60 min,such that we have 4 trains/h passing
between the two stations(2 trains/hourin each direction).Initially
they carry D0¼1000 passengers/hour.The probability that a train
meets another train at any given track segmentis