Guide bar

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

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

The rubber-tyred metro systems that incorporate 1,435 mm (4 ft 8 ¹⁄₂ in) track have angle irons as guide bars along the roll ways. The Busan Subway Line 4, that lacks a rail track, has I-beams installed with the flanges being vertical. The Sapporo Municipal Subway, that lacks a rail track as well, has none.

Railway infrastructure

Permanent way	Permanent way (history) Permanent way (current) Railroad tie/Sleeper Rail fastening system Track ballast Rail profile Fishplate Breather switch Datenail Axe ties Ladder track Baulk road Cant Minimum radius Track transition curve Clip and scotch

Trackwork and track structures	Junction Wye Railroad switch Gauntlet track Railway electrification system Third rail Overhead lines Guide bar Track gauge Track geometry Railway turntable Water crane Track pan Rail track Tramway track Classification yard Rail yard Siding Passing loop Balloon loop Headshunt Refuge siding Dual gauge Roll way

Signalling and safety	Derail Railway signalling Signalling control Wayside horn Railway signal Interlocking Level crossing Buffer stop Catch points Loading gauge Structure gauge Block post Train stop Signal bridge

Buildings	Railway station Station building Railway station layout Station clock Train shed Goods shed Motive power depot Roundhouse Railway platform

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See also