A roll way or running pad is the pad placed on a concrete slab or on the railroad tie on the outside of the conventional track along both rail profile of a rubber-tyred metro or along the unconventional track of a tram. The rubber-tyred wheels roll directly on the roll ways.
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With a conventional track:
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The ones of the Montreal Metro are precast concrete on a concrete slab.
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The ones of the Paris Métro are I-beam on ties.
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The ones of the Mexico City Metro are H-steel.
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The ones of the Santiago Metro are precast concrete below ground and H-steel above ground.
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The ones of the Lausanne Métro Line M2 are H-steel.
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The ones of the Lyon Metro (lines A, B and D) are H-steel.
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Without a conventional track:
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The ones of the Lille Metro are precast concrete.
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The ones of the Toulouse Metro are precast concrete.
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The ones of the Sapporo Municipal Subway are flat steel with a central guide rail.
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Busan Subway Line 4 runs directly on a concrete slab between .
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Many people mover systems, such as Crystal Mover, run directly on concrete slabs or other surfaces between guide bars.
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Some , 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 , precast concrete roll ways and conventional track
Image:M2-Ouchy-train-arrive+track.jpg|Lausanne Métro Line M2, showing the angle iron and the I-beam roll ways as well as
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
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The technology of rubber-tyred metros
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Translohr, uses rollways
External links
