iNTERESTING DETAILS

To enable trains to reach speeds in excess of 160 km/h, the railway infrastructure must be modified:

  • overhead lines must be changed and will thus be heavier,
  • the power supply voltage will be increased – trains travelling at higher speeds use more energy to accelerate and maintain speed,
  • the overhead lines must ensure stable contact between the pantographs and the lines at high speeds, and thus their tension must be increased; the distance between supports must be shortened,
  • 60E1 continuous rails, 60 kg/m,
  • larger curve diameters (some exceeding 4 km) to reduce the centrifugal force acting on passengers,
  • the cant of the tracks is increased to reduce the centrifugal force even more, but this negatively affects the operation of slower trains, in particular freight trains,
  • the diameter of railway tunnels should be larger to reduce the pressure changes caused by trains travelling at high speeds,
  • the distance between tracks is increased to 4.5 m to reduce the effects of rapid pressure changes caused by trains travelling in opposite directions,
  • concrete of pre-stressed concrete railway sleepers spaced every 60 cm,
  • at line speeds of over 160 km/h, no ground-level crossings are allowed – viaducts, tunnels or footbridges must be used instead,
  • the construction of bridges and viaducts must be reinforced.