This application allows users to browse route coverage and generate a heatmap from the NPMRDS. With time and location on the axes, the values are color coded by deviation from a calculated free-flow speed.
Start by zooming to your location of interest, click the Select Area button, draw a polygon around your route, and double click to finish. After a moment, select a highway and direction, and click Continue. On the following view, select a date range (10-day max; data availability lags 3-7 weeks from today), and click “Generate…”
Questions or requests for other information can be directed to firstname.lastname@example.org.