ROAD SAFETY ANALYSIS
New Hampshire Road Safety Analysis
Behavioral Insights Powered by StreetVision
The following road safety report evaluates road risk events in New Hampshire from January 2026 through March 2026. It examines phone distraction rates, intersection-level hard braking activity, and corridor-level speeding patterns to determine where risk is most concentrated.
The report leverages insights from CMT’s StreetVision, an AI-powered behavioral analytics platform that provides decision-ready insights into roadway risk before crashes occur. Transportation officials use StreetVision to identify hotspots, prioritize high-impact safety interventions, and evaluate the effectiveness of countermeasures.
Here is a snapshot of our findings — covering distraction benchmarking, county-level concentration analysis, high-risk intersection identification, and corridor speeding patterns.
01 PHONE DISTRACTION
Monthly distraction rates: A comparison to the national benchmark
In January 2026, drivers in New Hampshire recorded 18.38 phone tapping events per 100 miles, compared to the national average of 23.55, placing the state 22% below the US benchmark.
In February, the rate was 18.75, a 2% increase from the prior month, and 22.1% below the national average.
By March, phone tapping events decreased to 18.11 events per 100 miles, marking a 3.4% decrease from February. It was 23.8% below the US average.
phone tapping events per 100 miles
02 COUNTY ANALYSIS
County-level insights reveal concentrated rates of distracted driving
Across the three-month period, New Hampshire averaged 18.41 phone tapping events per 100 miles, though county-level data shows wide variation around that benchmark.
The most distracted counties, led by Coos, Carroll, and Hillsborough, recorded distraction rates roughly 7% – 10% above the state average, highlighting concentrated pockets of elevated risk.
In contrast, the least distracted counties, led by Merrimack, Grafton, and Sullivan, reported rates roughly 2% – 10% below the statewide average, underscoring a clear regional divide in driver behavior.
phone tapping events per 100 miles
Highest distraction
Lowest distraction
03 HARD BRAKING
High risk intersections: Where hard braking signals elevated crash risk
Intersections account for roughly 25% of all US traffic deaths and 50% of all traffic injuries. Hard braking often signals near-miss events, making it a leading indicator of elevated crash risk.
An analysis of Hillsborough County intersections found Old Wellington Road & Wellington Court to be a high-risk hotspot, with 351.6 hard braking events per 100 miles driven.
highest risk
Old Wellington Road & Wellington Court
351.6
hard braking events / 100 mi
other high risk intersections in New Hampshire
Hard Braking Events per 100 miles
Locations with persistently high hard braking activity are widely recognized as candidates for proactive intervention — where targeted engineering improvements, enforcement visibility, or behavioral countermeasures may reduce crash risk before crashes occur.
04 SPEEDING PATTERNS
When & Where Speeding Risk Peaks
Speeding behavior in New Hampshire follows identifiable time-of-day and corridor-level patterns, creating predictable windows of elevated risk.
On Hill Road in Merrimack County, NH (40 mph), speeding peaks on Tuesdays at 9:00 p.m., when 99.2% of driving time exceeds 10 mph over the limit. Additional elevated speeding periods include Thursdays at 8:00 p.m. and Tuesdays at 3:00 a.m.
These patterns provide actionable intelligence for speed studies, high-visibility enforcement, public awareness campaigns, and resource allocation decisions.
CORRIDOR ANALYSIS
Hill Road
Posted speed limit: 40 mph
Tuesdays: 9:00 p.m.
99.2%
of driving time exceeds the posted speed limit
Thursdays: 8:00 p.m.
97.9%
of driving time exceeds the posted speed limit
These patterns provide actionable intelligence for speed studies, high-visibility enforcement, public awareness campaigns, and resource allocation decisions.
05 SCHOOL ZONES
How fast are drivers going in school zones?
We analyzed speed distribution in the school zone at Bicentennial Elementary School on E Dunstable Rd in Nashua, NH. Our analysis found that 43% of drivers exceed the 20 mph speed limit during school hours. Fridays at 7:00 a.m. had the highest rate of speeding, with 23.5% of drivers going over 10 mph over the limit.
Understanding how frequently speeding occurs during school hours helps traffic engineers determine whether stronger safety measures are needed to better protect vulnerable road users.
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