Roll way

Not to be confused withRunway.

Aroll wayorrunning padis the pad placed on aconcrete slabor on thetieson the outside of the1,435 mm(4 ft8+1⁄2in)conventional trackalong bothrunning railsof arubber-tyred metroor along the unconventional track of atram.The rubber-tyred wheels roll directly on the roll ways.

• With a conventional track:
  • The ones of theMontreal Metroareprecast concreteon aconcrete slab.
  • The ones of theParis MétroareH-steelon ties.
  • The ones of theMexico City Metroare H-steel.
  • The ones of theSantiago Metroare precast concrete below ground and H-steel above ground.
  • The ones of theLausanne Métro Line M2are H-steel.
  • The ones of theLyon Metro(lines A, B and D) are H-steel.
• Without a conventional track:
  • The ones of theLille Metroare precast concrete.
  • The ones of theToulouse Metroare precast concrete.
  • The ones of theSapporo Municipal Subwayare flat steel with acentral guide rail.
  • Busan Subway Line 4runs directly on aconcrete slabbetweenguide bars.
  • Manypeople moversystems, such asCrystal Mover,run directly on concrete slabs or other surfaces between guide bars.
  • Someguided buses,rubber-tyred trams,such asTranslohrandBombardier Guided Light Transit,use concrete slabs while being guided by a singlecentral rail.

Gallery

• 
  View of a track from asand drag,in the Montreal Metro near theBeaugrand Station,showing the cross-section ofguide bars,precast concreteroll ways and conventional track
• 
  Lausanne Métro Line M2,showing the angle ironguide barsand theI-beamroll ways as well asbumper posts
• 
  Lille Metroline 1 near Quatre Cantons Workshop, the absence of conventional rail for guidance at junctions is compensated by a central stubguide rail.

See also

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

External links

• Visual dictionary
  • Truck and runway (bogie and roll way)
• Rail system
• VAL"Documentation technique du VAL 206 [dont le VAL 208 en est l'évolution]"(PDF).traction-electrique.ch(in French).Retrieved7 February2023.