Railworthiness Directive for Railroad Tank Cars Equipped With Certain McKenzie Valve & Machining LLC Valves
Keywords: Railworthiness Directive; Hazerdous Materials; Valve; Tank Cars
Abstract: This Directive requires railroad tank car owners to replace unapproved valves currently installed in some tank cars. The valves in question are UNNR ball valves manufactured and...
Keywords: Bridge and Structures Safety
Keywords: Bridge and Structures Safety; Grating; bridge worker; scaffolding; timber tie
Signal Recording Devices for Highway-Rail Grade Crossing Active Warning Systems that are Interconnected with Highway Traffic Signal Systems
Keywords: I�96�10; I�96�11 ; NTSB; active railroad warning systems
Keywords: Highway-Rail Grade Crossings; Low ground clearance; AASHTO Green book; vertical profile