Roll way
A roll way or running pad is the pad placed on a concrete slab or on the ties along the outside of the running rails of the conventional track of a rubber-tyred metro or along the unconventional track of a tram. The rubber-tyred wheels roll on the roll ways.
- 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 H-steel.
- 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
- Many people mover systems, such as Crystal Mover, run directly on concrete slabs or other surfaces between guide bars
- Some guided buses, rubber-tyred trams, such as Translohr and Bombardier Guided Light Transit, use concrete slabs while being guided by a single central rail
View of a track from a sand drag bumper post, in the Montreal Metro near the Beaugrand Station, showing the cross-section of guide bars, precast concrete roll ways and conventional track.
Ouchy M2 station, showing the angle iron guide bars, the bumper posts and the I-beam pxll ways.
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