Montana Department of Transportation

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Traffic Data - Maps

If you are working on or contracted to do an MDT project, do not use traffic data from this map. Please continue sending your formal traffic data requests via .

Welcome to MDT's Interactive Traffic map!

Statewide Traffic Count Site Map

If you are experiencing technical difficulties with the online statewide traffic map please use the "View Larger Map" link. TDCA is aware of these issues and we are working towards resolving these problems. We apologize for the inconvenience.

View larger map or use on mobile device

We hope you find the enhanced map and its new features useful.

There are multiple layers of information being displayed on the map therefore you must zoom in to see the dots identifying the traffic count sites. Click on the features in the map to display details.

The pop–up box displays data in multiple slides – scroll through the slides using the arrow at the top of the box.

The Statewide Traffic Count Site map displays published traffic data graphically. Some of the data items displayed are:

Annual Average Daily Traffic (AADT) – An estimate of the traffic volume one can expect to see on the roadway segment on an average day.

Traffic Count Locations – Shows the actual placement of the short term traffic counter and permanent ATR/WIM sites within the Traffic Flow segment.

Traffic Flow segments – Each roadway is broken into homogenous traffic segments for traffic collection and reporting purposes. Together these roadway segments form a connected road network.

Daily Vehicle Miles Traveled (DVMT) by County – County level DVMT is generated by multiplying each roadway segment's Annual Average Daily Traffic (AADT) by the segment's section length and then summing the DVMT for the roadway segments within the county. The shading on the map provides a quick view of the distribution of DVMT by county – the darker the shading, the higher the DVMT. DVMT is reported by On-System Routes (NHS Interstate, NHS Non-Interstate, Primary, Secondary, Urban), State Highways and Local routes.

Read more about other attributes found in the map…

Traffic Flow Map

This is a map showing rural traffic flow in Montana. Annual Average Daily Traffic (AADT) and Commercial Annual Average Daily Traffic (CAADT) have been weighted based on established major traffic breaks. The map is intended to give users a general idea of the traffic flow in Montana.

ATR and WIM Map

View larger map or use on mobile device

The ATR and WIM map is an interactive map that displays only the permanent sites. Click on any of the features in the map to show their details.

Disclaimer: This data set is provided "as-is" without warranty of any kind. The Montana Department of Transportation makes no representations or warranties whatsoever with respect to the accuracy or completeness of this data set and assumes no responsibility for the suitability of this data set for a particular purpose; and MDT will not be liable for any damages incurred as a result of errors in this data set.