Construction Worker Early-Warning LiDAR

Why It Matters

By giving workers a measurable reaction window, the LiDAR alarm could cut fatalities and reshape safety protocols on highways, prompting broader adoption of sensor‑driven protective systems.

Key Takeaways

• LiDAR provides ~3‑second warning at 70 mph vehicle speeds.
• System filters false triggers by delaying response to transient objects.
• Spotters can manually activate alerts via handheld button.
• Devices communicate over 900 MHz cordless frequency for synchronized alarms.
• Early warning aims to reduce 50‑150 annual highway worker deaths.

Summary

The video introduces Alpha Safety’s LiDAR‑based early‑warning system designed to protect construction workers on high‑speed roadways.

The technology delivers roughly three seconds of advance notice when a vehicle traveling at 70 mph approaches, enough for a worker to look up, assess danger, or move. It avoids “boy who cried wolf” false alarms by incorporating a slight detection delay, ignoring brief events like birds, while still allowing spotters to trigger alerts manually.

Founder Travis Masmer, a former DOT employee whose friend died on a job site, explains that the system links multiple speaker units via the legacy 900 MHz cordless‑phone band, enabling one speaker near the worker and another aimed at traffic. He notes the train horn’s 135 dB output as a benchmark, though the system uses lower‑volume alerts suitable for construction zones.

With 50‑150 highway workers killed each year, the LiDAR alarm could dramatically improve on‑site safety, offering a scalable, low‑cost solution that integrates into existing traffic‑control equipment and may set new industry standards for worker protection.

Original Description

At 70 mph, a 3-second warning can let a construction worker run away from a car that is crashing into a work zone. At the ATSSA Traffic Expo in Houston, a company shows me their LiDAR early warning system. #SafetyTech #Lidar #ConstructionSafety #WorkplaceSafety #Innovation