The purpose of the trip was to inspect the installation of ten ASEA screw-type retarders. The retarders are a part of a sulfur-wood chip dumping facility. The ASEA retarders were installed to reduce the noise caused by empty freight cars when they couple (local residents had complained.) Ten units had been installed in two groups of three set to retard cars over 4 kmh, and a final group of four set to retard cars over 1.5 kmh. Only the first six are being used, and these mostly at night. The final group of retarders was found to retard the cars too much and cause stalls.
Union Pacific has developed an unusual and innovative design for a yard that eliminates the use of a master retarder, with all control being concentra...
The purpose of this informal working note is to describe basic requirements on railroad yard geometric design. This yard geometric design document has...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.
United States Department of Transportation
[PDF-295.25 KB]
