The results of a study on the optical properties of Optical Automatic Car Identification (OACI) labels (modules) and the review of the physical and chemical properties leading to a better understanding of the tests conducted on Improved Surface Treatment, Standard, and overlayed labels are presented. Label operational lifetime is defined using as criteria a reduction to 5% of the original label retroreflectance during that period. Based on the IST tests, the estimated operational life of those labels in that environment will be on the order of 12 years, provided that no failure in substrate or mechanical action on the label occurs. This life estimate is compatible with test data from OACI modules. Solar radiation is identified as the major cause of non-reversible mechanisms determinant of OACI label operational life. Other operational and environmental factors with reversible and non-reversible components are identified. Some OACI label alternatives are suggested. Experiments and evaluations of OACI labels by the Association of American Railroads and railroads are indicated.

  • Supplemental Notes:
    • See also Volume 1, PB-291 877.
  • Corporate Authors:

    Cambridge Systems Corporation

    545 Technology Square
    Cambridge, MA  United States  02139

    Federal Railroad Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Ingrao, H C
  • Publication Date: 1979-3

Media Info

  • Pagination: 238 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00197315
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FRA/ORD-78/15.III Final Rpt., CSC-77-102
  • Contract Numbers: DOT-FR-74292
  • Files: NTIS, TRIS, USDOT
  • Created Date: Oct 17 1979 12:00AM