Speed, volume, occupancy
Per-lane measurements for both directions in 60-second bins.
Corridor backbone
Overview
A light solar mast trailer with a side-fire radar that measures speed, volume and occupancy in both directions. Pulses fill the gaps between the other nodes so a queue tail is always near a detection point.
Queue warning is only as good as the spacing of its detection points. Pulse is the low-power, low-cost node that closes the gaps between signs and cameras.
Every 60 seconds it reports per-lane speed, volume and occupancy, which Command turns into free-flow, moderate or heavy states for the queue-warning rules.
What it does
Pulse at work
Queue states
Readings feed the free-flow (over 45 mph), moderate (20 to 45 mph) and heavy (under 20 mph) states that drive the sign messages.
Two carriers
Two modems on two cellular carriers, so one network outage does not open a gap in detection.
See what happens when a Pulse stops reporting, with the same rules the system runs.
Open in the demoSpecifications
Design values
| Item | Value |
|---|---|
| Radar | Side-fire, up to 16 lanes, 255 ft lateral range |
| Mast | 20 ft |
| Data | Per-lane speed, volume and occupancy, 60-second bins |
| Communications | Two modems on two carriers |
Power
- Load
- 9 W
- Storage
- 4.6 kWh
- Solar
- 400 W
Sized for continuous operation on 4 hours of sun with 10 days of autonomy, and restarts on its own after an outage.
In the WZDx feed
traffic-sensor
Speed, volume and occupancy, with per-lane data.
Runs LaneWarden Edge
- GPS position reported within 10 ft
- Health, power and status every 60 seconds
- Local rules and fail-safe behavior that work without the network
- 72 hours of store-and-forward if the link drops
- Signed over-the-air software updates
Works with
Related devices
Inform drivers
LaneWarden Messenger
Portable changeable message sign that measures the traffic it warns
A full-matrix portable message sign with a Doppler radar facing oncoming traffic. It posts queue, delay and hazard messages from an approved library, and falls back to a safe message on its own if its data stops.
In every kitCorridor backbone
Detect traffic
LaneWarden Lookout
Camera, radar and edge-AI trailer
A solar mast trailer with a 40× pan-tilt-zoom camera, two AI cameras and a side-fire radar. It gives operators eyes on the corridor and measures traffic in both directions, with travel-time, weather and satellite options.
Corridor backbone
Guides
Go deeper
Fundamentals
What is a smart work zone?
Sensors, message signs, software and a team that runs them, set up for the life of a construction project. What a smart work zone is, what it does and how agencies ask for one.
4 min read
Queue warning
How end-of-queue warning systems work
Detection, thresholds, sign placement and the hidden-queue problem: how a queue warning system decides what drivers see, and what to ask of one.
3 min read
Next step
Planning a work zone that needs to be smart?
Tell us about the corridor, the schedule and the specification. We will walk you through how the system would be laid out and run.