United States Department of Transportation
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners.
As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
[PDF-445.13 KB]
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Informal Note 60
-
Corporate Publisher:
-
Abstract:The functions of Process Control Computers (PCC) in a hump yard may be categorized by two points of view: (1) From geographical area of the yard, or (2) from the nature of the function. Geographically the PCC function may be divided into several areas, and similarly there are several listed functions. In this informal note, the material will be organized in order of yard geography, with only three areas discussed in detail: pre-crest, crest, and crest-to-master retarder. Operations beyond the master retarder, such as the control of group and tangent point retarders and yard switching control, are not addressed.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
