eringMechanical engineeringPublic economicsPublic policyUrban planningExamplesAkashi Kaikyō BridgeAutobahnBrooklyn BridgeBus rapid transit systemsChannel TunnelControlled-access highway systemsElectric power transmissionHigh-speed trainsHong Kong International AirportHoover DamHumber BridgeKansai International AirportMillau ViaductNuclear powerOffshore wind farmsPanama CanalPort of ShanghaiSan Francisco–Oakland Bay BridgeSuez CanalSolar powerThree Gorges DamTrans-Alaska pipelineTranscontinental railroadsvteRail infrastructureTracks (history)Axe tiesBallastBaulk roadBreather switchCantClip and scotchDate nailFastening systemFishplateLadder trackMinimum radiusProfileTie/SleeperTransition curveTrackworkBalloon loopClassification yardHeadshuntPocket trackJunctionGauntlet trackGuide barPassing loopTrack gaugedual gaugeRail tracktramway trackRail yardRailway electrificationoverhead linesthird railground-level power supplyRailway