Highway Tools for the Field and the Office.
SnagMP is a suite of tools built for highway professionals. Locate mileposts, generate elevation profiles, analyze cross-sections, and collect field data — all powered by official state DOT data. Currently supporting 41 states across the US.
SnagMP Maps
Web ApplicationAn interactive map-based milepost locator with elevation analysis, cross-sections, and site data. No install required — works in any browser at snagmp.com.
Click-to-Locate
Click anywhere on the map to instantly retrieve the nearest route, milepost, direction, elevation, and offset from official state DOT data.
Milepost Search
Enter any Route and Milepost to zoom directly to that location. Supports mainline routes, spurs, couplets, alternates, and direction selection.
Cross-Sections
Visualize roadway cross-sections at any milepost using USGS 3DEP LiDAR. See ground elevations, right-of-way boundaries, and parcel data.
Site Data
Automatically fetch speed limit, functional class, AADT, NHS designation, city, county, and more for any location across all supported states.
Parcel & ROW Analysis
View adjacent parcel boundaries, computed right-of-way widths, and property data overlaid on the cross-section and map. Available in 30 states.
41-State Coverage
Milepost lookup powered by each state's official DOT data. Site data from FHWA HPMS, Census TIGERweb, and BLM PLSS national sources.
No install needed — works on desktop and mobile
SnagMP Field
Mobile AppA GPS-based milepost locator built for highway fieldwork. Runs on your phone as a Progressive Web App — no app store needed — and works completely offline after a one-time data download.
Live Milepost Tracking
Continuously updates your state route and milepost to the nearest .001 as you move. Shows offset distance when you're off-route.
Station (STA) Mode
Set a station reference at your current milepost and track your station value in real time as you walk or drive. Ties project stationing to mileposts.
Map View
A track-up moving map showing nearby state routes with milepost tick marks. Zoom adjusts automatically based on your travel speed.
Dataset Overlays
Download supplemental datasets like Fish Passage Culverts. See a proximity-sorted list of nearby features with distance, stream name, and barrier status.
Fully Offline
The entire state route network is stored on your phone. No cell service needed after initial setup — built for remote highway locations.
High-Visibility Display
Designed for outdoor use with a high-contrast display. Easy to read in bright sunlight while on the job site.
Install to your home screen for the best experience