Roll way

View of a track from a sand drag bumper post, in the Montreal Metro, showing the cross-section of guide bars, precast concrete roll ways and conventional track

Ouchy M2 station, Showing the angle iron guide bars and the I-beam roll ways

A roll way or running pad is the pad placed on a concrete slab or on the ties outside of the rails of the conventional track of a rubber tired metro.

• With a conventional track:
  • The ones of the Montreal Metro are precast concrete on a concrete slab.
  • The ones of the Paris Métro are H-steel on ties.
  • The ones of the Mexico City Metro are H-steel.
  • The ones of the Santiago Metro are precast concrete below ground and H-steel above ground.
  • The ones of the Lausanne Metro Line M2 are H-steel
  • The ones of the Lyon Metro (lines A, B and D) are (?)
  • The ones of the Lille Metro are precast concrete
  • The ones of the Toulouse Metro are precast concrete.
• Without a conventional track:
  • The ones of the Sapporo Municipal Subway are flat steel with a central guide rail
  • Busan Subway Line 4, runs directly on a concrete slab between guide bars
  • Guided buses and people movers run directly on concrete slabs or other surfaces between guide bars

See also

• The technology of rubber-tyred metros