The Roadway Inventory Program

The Roadway Inventory Program is responsible for maintaining and updating the Road Inventory System (RIS) database. This database consists of the NMDOT’s Linear Reference System (LRS) and, data items necessary for yearly Highway Performance Monitoring System (HPMS) reporting requirements. The Roadway Inventory Program is also responsible for collecting and housing many of the Model Inventory Roadway Elements (MIRE). The Roadway Inventory Program responds to both internal and external data requests.

Data requests can be sent via email to or

John Baker, Roadway Inventory Program Manager / LRS Manager

Christian Ovalle, HPMS Coordinator

Roadway Inventory System

The NMDOT uses Esri’s Roads and Highways ArcMap module as its database of record for housing the Linear Reference System (LRS). A Linear Reference System is a method of spatial referencing, in which the locations of physical features along a linear element (such as a road) are described in terms of measurements from a fixed point, such as mile post “0”. Each feature is located by either a point (e.g., a stop sign) or a line (e.g., a no-passing zone).

 NMDOT’s current LRS is modeled after the All Roads Network Of Linear Referenced Data ARNOLD mandated by FHWA. This requires that all roads in the state that are open to the public be included in the LRS.

Legal Route Descriptions (2020)

Highway Performance Monitoring System

The HPMS was first developed in 1978 and is mandated by Congress in 23 USC 502(h).

The current HPMS Field Manual, known as HPMS 8.0 (December 2016), provides more detailed information.  A new Field Guide, known as HPMS 9.0 is currently in Draft status.

FHWA periodically updates their website with HPMS data from the many states:

Download HPMS Shapefile Format for years 2011-2017 (FHWA)

2018 HPMS ArcGIS WebMap (FHWA)

Key HPMS Reports

Extent & Travel reports (Daily Vehicle Miles Traveled)

Pavement Report Cards

HPMS Scorecards