Flawed HSR Designs Pose Derailment Risk

Susan MacAdams, the former HSR Planning Manager for LA Metro, wrote to Brian Kelly, CEO of the California HSR Authority, today. In her Request For an Immediate Stop Work Order, she identified serious safety risks in the design of the structures now under construction in Fresno: “the design for the track curves across the Herndon Overpass structure north of Fresno is a public safety hazard and poses a serious threat to derailment.”  

Summary: Combining a horizontal spiral that increases from zero to six inches of super-elevation with a maximum grade vertical curve built on top of a transitional structural support system in a geographical area that experiences extreme temperature range is very dangerous for trains traveling at any speed. This is a request to immediately issue a Stop Work Order to the Contractor for all structures on the Merced to Fresno segment of California High Speed Rail.

A large compendium of attachments accompanied her letter. See the complete correspondence between her and CHSRA’s Chief Program Manager, Frank Vacca.

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