Scottsdale, AZ — National Signal LLC., a leading manufacturer of transportation safety products and Intelligent Transportation Systems (ITS) and HS Connect® software, today announced the integration of the Flow Labs API into its Smart Work Zone product line. The Flow API provides HS Connect® with real-time travel time and speed data, enabling more responsive and intelligent work zone management for state DOTs and contractors across the country.

Work zones remain one of the most dangerous environments on America's roadways. According to the Federal Highway Administration, there are over 800 fatalities in work zones each year. Real-time data is critical to detecting queue formation, warning motorists of changing conditions, and enabling faster incident response. By integrating the Flow API, National Signal is bringing software-defined traffic intelligence directly into its HS Connect® platform and field devices — without the need for dedicated roadside sensors.

The Flow API delivers probe-based travel time and speed data at scale, providing continuous coverage across any roadway segment in the United States. HS Connect® will use this data to power real-time travel time displays on portable message signs, enhance queue detection algorithms, and provide DOTs with richer performance analytics for active work zones.

“Real-time data is the backbone of effective Smart Work Zone deployments. The Flow API gives us a powerful, scalable data source that integrates seamlessly with our HS Connect® platform, so we can deliver better outcomes for our customers and safer conditions for road workers and drivers.” — Pete Krikelis, VP ITS Development, HS Connect

“National Signal is a leader in keeping work zones safe, and we're proud to power their solutions with the Flow API. This integration shows how real-time, software-defined data infrastructure can replace legacy sensor deployments and deliver better results at lower cost.” — Jatish Patel, CEO, Flow Labs

About Hill & Smith Inc.

National Signal LLC., is a subsidiary of Hill & Smith PLC (LSE: HILS), designs, manufactures, and markets a wide range of transportation safety products, services, and software. The company's portfolio includes Connected Traffic Safety equipment, such as Message Signs, Arrow Boards, Radar/Speed Trailers, Queue Detection, Light Towers, Surveillance Trailers and a comprehensive suite of ITS Smart Work Zone solutions powered by the HS Connect® software platform. National Signal LLC., is dedicated to advancing work zone safety, ITS, and roadside safety nationwide. For more information, visit HS-Connect.com.

About Flow Labs

Flow Labs is a transportation technology company that builds AI-powered software for traffic signal management, real-time data analytics, and mobility intelligence. The Flow Platform and Flow API serve state DOTs, municipalities, and private-sector partners across the United States, delivering measurable improvements in congestion, safety, and operational efficiency. For more information, visit www.flowlabs.ai.