Taper crossing
A tracked vehicle crosses the taper line into the closed lane.
Protect crews
LaneWarden Sentinel
Worker-protection trailer that alarms before a vehicle reaches the crew
In every kit
Overview
A mast trailer at the upstream end of the taper or flagger station. Tracking radar and AI cameras watch the approach; when a vehicle is on course for the work space or cannot stop for the flagger, it sounds a 110 dB siren and strobes, texts the foreman and saves the video.
Sentinel is the predictive layer of LaneWarden worker protection. It tracks every vehicle on the approach and asks one question many times a second: will this vehicle end up where the crew is?
The alarm logic runs on the trailer. Siren and strobes do not wait for a cellular connection or a server, and the alarm is logged with a video clip for review afterwards.
What it does
Sentinel at work
Intrusion trajectory
A vehicle's path and speed put it in the work space within a set number of seconds.
Too fast to stop
A vehicle approaches a flagger or automated flagger assistance device faster than it can stop in the distance left.
Alarm chain
Siren of at least 110 dB at 50 ft and strobes at the trailer, a text message to the foreman, and a video clip in Command.
Follow the intrusion alarm chain second by second, with the same rules the system runs.
Open in the demoSpecifications
Design values
| Item | Value |
|---|---|
| Tracking radar | Up to 64 objects, about 460 ft for cars and 590 ft for trucks, ±50° field of view |
| Cameras | Two AI cameras on the taper and approach, plus PTZ |
| Siren | At least 110 dB at 50 ft, with strobes |
| Alarm latency | Target: within 1 s of detectionDesign target, to be measured in field testing |
| Alerts | Siren and strobes locally; SMS to the foreman; clip to Command |
Power
- Load
- 64 W active, 9 W standby
- Storage
- 18 kWh
- Solar
- 1,800 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
Approach speeds. Intrusion events stay in Command; WZDx has no intrusion type.
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 Pace
Variable speed limit sign with speed feedback
A trailer-mounted regulatory speed limit sign with a YOUR SPEED display. It shows the work zone limit when workers are present and the normal limit when they are not, inside the envelope the agency approved.
In every kit
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
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
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
Worker protection
Work zone intrusion alarms: how much warning do crews get?
An intrusion alarm buys seconds. How many depends on how far out a vehicle is detected, how fast it is going and how the work zone is laid out. The numbers, worked through.
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.