Roll way

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A roll way or running pad is the pad placed on a concrete slab or on the ties on the outside of the conventional track along both running rails of a rubber-tyred metro or along the unconventional track of a tram. The rubber-tyred wheels roll directly 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 Métro Line M2 are H-steel.
** The ones of the Lyon Metro (lines A, B and D) are H-steel.
* Without a conventional track:
** The ones of the Lille Metro are precast concrete.
** The ones of the Toulouse Metro are precast concrete.
**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.

Gallery

Image:QC-STM GarageBeaugrand 20040706-132759 VoieEssai.jpg, View of a track from a sand drag, in the Montreal Metro near the Beaugrand Station, showing the cross-section of guide bars, precast concrete roll ways and conventional track
Image:M2-Ouchy-train-arrive+track.jpg, Lausanne Métro Line M2, showing the angle iron guide bars and the I-beam roll ways as well as bumper posts
File:Ligne 1 du métro de Lille Métropole - Garage-atelier des Quatre Cantons (11).JPG, Lille Metro line 1 near Quatre Cantons Workshop, the absence of conventional rail for guidance at junctions is compensated by a central stub guide rail.

See also

* The technology of rubber-tyred metros
* Translohr, uses rollways

External links

Visual dictionary

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Rail system
* VAL

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Permanent way