Milepost equation explained

A milepost equation, milepoint equation, or postmile equation is a place where mileposts on a linear feature, such as a highway or rail line, fail to increase normally, usually due to realignment or changes in planned alignment.[1] [2] In order to make mileposts consistent with the real mileage, every milepost beyond the equation would need to be moved.[3]

For example, an equation of 7.6 back = 9.2 ahead means that the feature does not have any section between mile 7.6 and mile 9.2, and the distance between mileposts 7 and 10 is only 1.4 miles. This would usually be caused by a relocation that shortened the distance by 1.6 miles. It is also possible for an equation to add mileage to what it would otherwise be; the duplicated mileposts receive a special prefix, such as Z.[1]

See also

Notes and References

  1. Web site: Oregon Department of Transportation. ODOT Approved Terms & Definitions. August 7, 2020. https://web.archive.org/web/20070624002627/http://www.oregon.gov/ODOT/TD/asset_mgmt/AssetMgmtTermsAndDefinitions.shtml . June 24, 2007 .
  2. Federal Register. 69. 190. October 1, 2004. STB Docket No. AB-33 (Sub-No. 220X). https://web.archive.org/web/20200807171125/https://www.govinfo.gov/content/pkg/FR-2004-10-01/html/04-21983.htm. August 7, 2020. August 7, 2020. live.
  3. Web site: Utah Department of Transportation. UDOT Milepost Project: Project Plan. August 7, 2020. https://web.archive.org/web/20070807041202/http://www.udot.utah.gov/mileposts/info.html . August 7, 2007 . dead.