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Guide bars, or guiding bars [1] are rubber-tyred metro systems that incorporate 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge track. They have angle irons as outside of the two roll ways . The Busan Subway Line 4 lacks a rail track , and has I-beams installed as guide bars.
An anti-roll bar (roll bar, anti-sway bar, sway bar, stabilizer bar) is an automobile suspension part that helps reduce the body roll of a vehicle during fast cornering or over road irregularities. It links opposite front or rear wheels to a torsion spring using short lever arms for anchors.