Editing Linear referencing (section)

===ARNOLD: US Federal Requirements for Highways===

The US Federal Highway Administration is pushing states to move closer to standardization of LRS data with the ARNOLD requirement. To wit:
<blockquote>"On August 7, 2012, FHWA announced that the HPMS is expanding the requirement for State Departments of Transportation (DOTs) to submit their LRS to include all public roads. This requirement will be referred to as the All Road Network of Linear Referenced Data (ARNOLD)".<ref>{{cite web|title=All Road Network of Linear Referenced Data (ARNOLD) Reference Manual|url=https://www.fhwa.dot.gov/policyinformation/hpms/documents/arnold_reference_manual_2014.pdf|publisher=Federal Highway Administration|accessdate=15 November 2016}}</ref></blockquote>
The ARNOLD requirement sets the stage for systems that utilize both LRS and coordinates. Both systems are useful in different contexts, and while using latitude and longitude is becoming very popular due to the availability of practical and affordable devices for capturing and displaying global coordinate data, the use of LRS has widely been adopted for planning, engineering, and maintenance.