This page provides access to the current Signal Standards of the John Holland Rail CRN Engineering Standards.
Select a category from the left hand menu to access the relevant Signal Standards.
If you are new to JHR CRN Engineering Standards please read CRN GM 001 Engineering Standards System Manual before using any other engineering standards that are listed and available in this site.
Please contact us if you have any questions about the Engineering Standards or about this section of the site.
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