Page 544 - 360.revista de Alta Velocidad - Nº 6

González Franco, Ignacio

In the following table (Table 4), the range of total investment cost obtained for each type of
terrain considering different speed intervals is shown.

Table 4: Range of cost per kilometre depending on the type of terrain and
maximum speed.

4.2.1 Study case: Effect of the maximum speed on the investment cost

The idea of this section is to allocate, for each of the sub-sections defined in the scenario
(chapter 2.1), a maximum design speed and estimate the investment cost of this sub-
section according to the values obtained in Figure 5. The total investment cost of the line
will be the sum of the investment cost for the four different sub-sections in which the line
has been split.

For each combination of maximum design speed (one maximum design speed for each
subsection) an investment cost is obtained, but also (knowing the length of each sub-
sections) a commercial speed. Thus, it can be asserted that for each commercial speed
there are different investment costs, since there are numerous combinations of maximum
speed that obtain the same commercial speed.

Below it is included graphically (Figure 6) the relationship between commercial speed and
investment cost (total cost and cost per kilometre) for the study case here analysed.

Figure 6. Study case: relationship between commercial speed and investment cost.

542 360.revista de alta velocidad