See the moment before it becomes a statistic.

Cumulant helps traffic engineers and Vision Zero teams analyze pedestrian conflicts, yielding behavior, and near misses, with video evidence for intersection safety reviews.

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Why the biggest road safety risks
escape the report

Pedestrian crossing the intersection with a vehicle approaching

A quiet record.

Crash history captures reported outcomes.

Reported crashes

Recorded outcomes

10th & Polk · Crash records

Act on risk before it becomes crash history

Crash reports document where harm occurred. Cumulant measures near misses, unsafe interactions, and recurring conditions at a specific site so agencies can identify where action may be needed sooner.

Crash history records outcomes

Crash records remain essential, but serious events are infrequent and reliable patterns can take years to emerge.

Pedestrian crossing in front of an approaching car

Detects risks before they turn to injuries

Cumulant detects potential conflicts, yielding failures, evasive movements, and other observable interactions that provide earlier evidence of risk.

Site-level observation shows what is happening

Network data can identify where to look. Cumulant connects each event to the movements, road users, timing, visibility, and street geometry at that location.

128Pedestrians

346Vehicles

24Cyclists

Realtime Safety Intelligence in Action

Interaction detected

PEDESTRIAN × VEHICLEFailure to yield

Deploy to sites where users are vulnerable

Apply the same study method wherever street design, timing, and local behavior shape exposure.

Aerial view of vehicles and crossings at a Los Angeles intersection

IntersectionsWhich movements and time periods produce repeated conflicts?

Yellow school bus at a New York City intersection

School zonesWhere are students and pedestrians exposed during arrival and dismissal?

Aerial view along a New York City street with traffic

CorridorsHow does risk change across locations and operating periods?

USPS delivery truck on a busy New York City street

CurbsHow do loading, pickup, and stopping behavior affect visibility and movement?

Workers and a truck beside street barriers in New York City

Work zonesHow do temporary street changes alter movement and exposure?

Bike lane and street near Brooklyn Bridge

Bike-lane expansionDo new facilities reduce exposure and unsafe interactions?

Annotated near-miss event observed at 10th and Polk in Topeka, Kansas

Direct observation made recurring behavior visible at 10th and Polk

A two-week portable study connected each reviewed event to its time, place, and surrounding movement near Topeka High School.

Question: What roadway behaviors were exposing students and pedestrians to risk?
Observed: Movement, yielding, braking, conflicts, and other scoped behavior
Result: Repeated failure-to-yield, near-miss, and rapid-braking events became inspectable

Read the Topeka case study

Bring us one intersection, corridor, or safety question

We’ll help define the smallest site-specific study that can support a real decision.