Roadway Safety Hotspot Dashboard

This tool identifies CMV (commercial motor vehicle) harsh braking hotspots across selected states or territories. Users can rank roadway segments by harsh braking counts or rates, view the results on a downloadable map, and review the ranked segment table.

Compare With

Selected CMV Harsh Braking Hotspots Map

The map shows the roadway segments with the highest selected harsh braking measure. Turn on comparison to view the same selection with another harsh braking measure.

Ranked Measure

Segments shorter than 0.1 mile and records flagged as outliers or data errors are excluded.

The table lists the selected hotspot segments and key roadway details. Download it for additional review.

Cluster & Heat Map

This view groups nearby hotspot segments and adds a heat layer so larger patterns are easier to see. Circle size shows the total harsh braking activity in a cluster; color shows how severe the average segment is compared with the selected states. For harsh event measures, the color bands use the selected percentile preset from the states you picked.

CMV Harsh Braking Cluster Map

Color scale updates from the selected states.
Select one or more states to load the hotspot map.
Map Layers

Segments shorter than 0.1 mile and records flagged as outliers or data errors are excluded from the analysis/ranking.

This tab compares CMV crash patterns with harsh event patterns for Texas, North Carolina, and Washington. It first checks how often the top-ranked segments from the crash data overlap with the top-ranked segments from the harsh event data. It then separates segments into high-crash and non-high-crash groups and compares their telematics and roadway characteristics. Together, these summaries exhibit whether segments with more crashes also tend to have more harsh events or different roadway features.

Overlap of Top Crash and Harsh Braking Locations

This checks whether the highest-crash roadway segments are also among the highest harsh-braking segments. For example, it compares the top 20% crash locations with the top 20% harsh braking locations.

Random Selection is a simple reference point: it shows the overlap expected if roadway segments were selected at random.

Choose options and click Compute to see the overlap chart and table.

How Crash and Harsh Braking Hotspots Overlap

Higher values mean crash hotspots and harsh braking hotspots are identifying more of the same roadway segments.

Segments shorter than 0.1 mile and records flagged as outliers or data errors are excluded.

Harsh Braking Comparison by Crash Risk Group

This compares harsh braking on the segments with the highest crash counts against the rest of the roadway network. Use Top % to choose how many high-crash segments are included in Group 1.

Run a comparison to summarize the selected crash-risk groups and compare harsh braking between them.