Reliable Detection for Every Approach, Every Road User, Day and Night

SIMPL-Intersection uses LiDAR and AI-powered perception to deliver reliable vehicle, pedestrian and cyclist detection at signalized intersections. With real-time controller integration and actionable traffic data, it helps agencies improve signal operations, support safer crossings and gain a clearer understanding of how their intersections perform.

 

Results

More than detection. A smarter way to manage intersections.

Many intersections run a mix of detection: loops at the stop bar, another system for advance detection, push buttons or cameras for pedestrians. Each one is installed, maintained and replaced on its own schedule.

SIMPL-Intersection brings stop-bar, advance and pedestrian and cyclist detection together in one LiDAR system, typically two sensors mounted on existing poles. It passes calls to your controller, and every road user it tracks becomes data for performance measures, retiming and safety analysis. 

 

 

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HOW IT WORKS

One intersection. Two sensors. A complete view.

SIMPL-Intersection typically uses two LiDAR sensors mounted diagonally on existing roadside poles to cover all approaches of a signalized intersection.

 

LiDAR Sensors

Seyond 3d LiDAR sensors continuously scan the roadway and capture the position and movement of vehicles, pedestrians and cyclists, in all weather and lighting conditions while ensuring privacy.

 

Seyond's LiDAR sensors and EP1 Edge Box have passed NEMA TS2 certification. SIMPL is also BABA compliant.

Detect and Understand Road Users

Seyond's traffic perception software, powered by Seyond's EP1 durable edge processor, delivers reliable and accurate fusion of point cloud data from multiple LiDAR sensors into a comprehensive view. It classifies all road users at the intersection, tracking their trajectories and providing detailed data on counts, speed, size, and red-light violations and more.

 

Virtual detection zones can be configured to match the intersection layout and traffic requirements.

Deliver actionable outputs

SIMPL sends detection calls to the existing traffic signal controller through supported interfaces, including SDLC, NTCIP and contact closure (I/O).

 

The same tracks feed ATSPM, retiming studies and safety analysis through the SIMPL Data & Analytics module. 

BENEFITS

Detection you can trust. Data you can use. 

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Improve signal operations

Provide reliable detection calls to the traffic signal controller and support more responsive signal operations, including pedestrian extensions and configured detection strategies.

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See pedestrians and cyclists

Detect and track pedestrians and cyclists in crosswalk, sidewalk and midblock zones, and support pedestrian extension for people who need more time to cross.

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Easy to install and maintain

SIMPL-Intersection is a non-intrusive, easy-to-install technology that requires less maintenance than traditional traffic control equipment. We provide all the tools and support needed for installation.

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Data from the same install

Volume, speed, occupancy, classification, trajectories and turning movements for ATSPM and signal retiming, without a separate count program.

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Reliable in adverse weather and lighting

LiDAR brings its own light source, so it performs at night and in glare, and is designed for rain, snow, fog and dust. Tested in Finnish winter at 97.7% accuracy.

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Privacy safe

LiDAR technology uses laser pulses to create a detailed point cloud of the intersection. It doesn't capture or use biometric data or personal information like facial features and license plates.

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Safety analytics

Road-user trajectories, red-light violation detection and Vulnerable Road User monitoring show where risk is building, so you can act before crashes happen.

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Corridor Visibility

Multi-node fusion joins neighboring intersections into one continuous view, so you can follow how traffic moves along the corridor.

Queue Lenght Monitoring

A full suite of core features to understand and manage an intersection.

SIMPL-Intersection brings a suite of core features that modernize the way cities monitor and manage intersections:

  • Vehicle Stop Bar Detection
  • Vehicle Advance Detection (up to 200 m)
  • Queue Length Monitoring
  • Vulnerable Road Users Detection
  • Intersection Safety
  • Signal Performance and Retiming
  • Corridor-Level Visibility

 

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FIELD RESULTS

Accuracy you can check.

  • Stop-Bar Count Accuracy

  • Winter Conditions, Finland

  • LiDAR vs Inductive Loops

  • Midblock Pedestrian Insights

99% stop-bar count accuracy 

909 vehicle events checked against a manual count. Loops at the same spots missed 135 events, mostly close-following vehicles. 

READ THE REPORT

97.7% accuracy in snow, sleet and ice 

Detection and classification of cars, buses and trucks at the stop bar in snow, sleet, ice and wind. Two Falcon K sensors. 

READ THE REPORT

2% average deviation against video ground truth

Stop-bar counts against video ground truth at a five-lane approach in Amsterdam, NL. Loops at the same site averaged −17%. 

READ THE REPORT

Midblock pedestrian findings, plus the ITS Georgia 2024 award 

In a recent effort to enhance pedestrian safety, Seyond has installed its cutting-edge SIMPL-Intersection solution at a busy city intersection in Peachtree Corners, Georgia. The primary goal: to detect and analyze the behavior of all road users, including vulnerable pedestrians and understand the patterns and behaviors of pedestrians crossing mid-block, as previous data on these events had been largely speculative. 

READ THE CASE STUDY

Data-ready

Access in-depth data and analytics instantly with Seyond's Data and Analytics add-on module. This add-on module connects directly to the traffic signal controller, supporting ATSPM feedback on the intersection, while simultaneously delivering signal phase commands from pre-programmed timing plans on most traffic controller platforms.

  • Vehicle and VRU Classification and count (cars, buses, trucks, pedestrians, cyclists)
  • Traffic Volume
  • Vehicle Speed Analytics
  • Vehicle Dimensions Analytics
  • Vehicle Trajectory Data
  • Turning Movement Counts

 

Talk to our ITS Team
SIMPL Real-Time Traffic Data
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Designed to simplify deployment and maintenance.

SIMPL-Intersection is designed to work with existing roadside infrastructure and traffic signal systems, helping contractors deliver more capabilities with fewer devices to install and maintain.

  • No pavement cuts: Pole-mounted sensors eliminate the need for in-pavement detection loops.
  • Fewer devices: Typically two sensors provide detection across all approaches.
  • Existing controller integration: Connect through supported SDLC, NTCIP or contact-closure interfaces.
  • Flexible detection zones: Adjust virtual zones in software when intersection layouts or lane configurations change.
  • Remote system monitoring: Self-monitoring, fault alarms and automatic failover to a backup system partition help support system availability.
  • Roadside-ready hardware: The SIMPL-EP1 edge computer is designed for traffic cabinet environments.
  • Fully supported: Seyond's team is proud to provide support in all areas: training, client meetings, integration, installation, set up and configuration, and maintenance.
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Datasheet

SIMPL-Intersection datasheet

Full specifications, accuracy by sensor and hardware details.

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Accuracy Report

Accuracy reports

Field tests against ground truth in Florida, Finland, the Netherlands and more.

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Comparison Article

Inductive loops vs. LiDAR

How installation, maintenance and accuracy compare at the stop bar.

Read the comparison
Calculator

Total cost of ownership calculator

Compare the lifecycle cost of LiDAR, loops, video and radar for your project.

Use the calculator