Understand Risk Before Injuries
Evaluate Projects Clearly
Reduce Manual Work
Measuring the street,
not just the intersection.
Most street-safety measurement relies on intersection cameras, summary counts, and point-in-time snapshots. Cumulant reads continuous behavior across the full block.
Blind spots from intersection-focused camera placement
Intersection cameras cover the signal zone well, but the mid-block crosswalk further down the block sits entirely outside meaningful coverage. Activity there goes unmeasured.
Coverage extends beyond the intersection node
Cumulant measures the corridor itself, so the mid-block crossing becomes part of the same readable system rather than a gap between isolated camera views.
Counts are not behavior
A count can register a cyclist, a vehicle, and a pedestrian as three discrete events, while missing the fact that they are sharing the same constrained lane space at the same moment.
Behavioral context turns raw counts into street intelligence
Cumulant measures how people and vehicles occupy the street together, making proximity, interaction, and lane competition visible instead of flattening them into isolated tallies.
Static snapshots miss state behavior
A curb can appear clear or occupied in a single frame, but that frozen view misses the nuanced sequence where a passing vehicle, a blocked loading zone, and a pedestrian crossing create a near miss.
Street state changes become readable over time
Cumulant reveals evolving street state, showing how repeated loading behavior, passing maneuvers, and pedestrian movement combine into a risk pattern that snapshots cannot explain.
Cumulant turns street activity into measurable evidence.
Learn MoreHow It Works
Hardware Automatically Captures Traffic Data
Roadside sensors continuously capture real-world traffic activity, including vehicle movement, pedestrian activity, and multimodal interactions - either through Cumulant hardware or existing infrastructure feeds.
Physical Intelligence Interprets Multimodal Interactions
Cumulant’s AI models process raw sensor feeds in real time, identifying trajectories, conflicts, and safety-relevant behaviors while organizing the data in a centralized project dashboard.
Data Becomes Safety Intelligence
The platform transforms observations into clear analytics, visualizations, and reports that help cities identify risk, evaluate treatments, and understand safety performance over time.
Single Source of Truth for Smart City Mobility & Transport
We collect data directly from the street using infrastructure sensors - capturing real traffic behavior instead of relying on aggregated signals or statistical models.01
Ground-Truth Measurements
Lane-level trajectories, speeds, and multimodal interactions are measured with high spatial and temporal precision, providing reliable inputs for modern safety studies.02
Engineering-Grade Accuracy
Every insight is backed by observable events and sensor data, allowing planners and engineers to review, validate, and confidently defend their safety decisions.03
Transparent and Verifiable
Built for the safety questions cities are already trying to answer.
From network prioritization to treatment validation, we support common city safety and planning efforts with analysis tailored to real project needs.
High-injury network prioritization
Identify where deeper intervention is warranted across corridors and intersections.
School zone and vulnerable road user safety
Understand where walking and biking conditions create elevated risk.
Corridor and intersection safety analysis
Examine how speeds, conflicts, and movements vary across real street conditions.
Before-and-after project validation
Measure whether roadway changes are improving conditions after implementation.
Unified Platform for Roadway Safety Studies
Everything needed to conduct modern safety studies - from automated ground-truth data collection to AI-driven risk analysis and incident reporting. Cumulant replaces manual field studies and fragmented tools with a single platform that continuously measures and interprets real traffic behavior.
Before / After Evaluation for Traffic Treatments
Measure how street and signal changes affect safety, operations, and road user behavior before and after implementation.
Quantify changes in speed, delay, queueing, and multimodal volumes
Measure conflicts, near misses, TTC, and PET without waiting on crash data
Produce defensible treatment evaluations for crossings, signals, curb changes, lane reallocation, and speed-management projects
-
![]()
Automated Traffic Studies
-
![]()
AI-Driven Data Analytics/Visualizer
-
![]()
Real-Time Traffic Alerts
-
![]()
Before-and-After Evaluation
-
![]()
Free and Modular Hardware System
-
![]()
Risk Profiling and Crash Topology
-
![]()
Incidents Report
-
![]()
Compliance-Ready Safety Reports
Transform your safety infrastructure and start your safety study today.
Tell us about your corridor, intersection, or safety program. We’ll help you understand how Cumulant can support automated data collection, AI-driven analysis, and ground-truth safety intelligence for your project.