LED road sign B-20 STOP
Active Road Signs B-20 and B-33 with Doppler Radar – Intelligent LED Warning Systems
Active road signs B-20 STOP and B-33 Speed Limit are advanced traffic safety devices equipped with a modern Doppler radar sensor. The system activates LED flashers only when it detects a vehicle moving at excessive speed or failing to comply with the stop requirement. This solution significantly improves driver alertness – unlike continuously flashing signs, it eliminates the habituation effect and stimulus fatigue.
Effective Road Safety Enhancement
Active signs B-20 and B-33 are particularly recommended in high-risk locations, such as:
- Railway crossings
- Dangerous intersections
- School and preschool zones
- Roads with limited visibility
- Areas with high pedestrian traffic
- Entrances and exits from industrial sites and warehouses
Doppler Radar – Intelligent Detection
The built-in Doppler radar analyzes vehicle speed and direction, activating LED warning lights only when a real hazard is detected. The system increases signage visibility and effectively prompts driver reaction.
Key Features and Technological Advantages
- Radar detection – activation only in hazardous situations
- Two design variants – yellow LED diodes or red border with white pictogram
- Low-energy LED technology – ideal for solar power operation
- Lightweight, durable composite construction – weather-resistant
- Automatic brightness adjustment – visible during the day, no glare at night
- Autonomous operation – optimized energy consumption, extended system runtime
- Mounting options: Ø 60 mm or 76 mm posts
- Versions: roadside or over-road (on steel cantilever)
- Controller increases solar efficiency by over 40% compared to standard solutions
- Compliant with PN-EN 12352 standard
Ideal Solution for Road Infrastructure
Thanks to intelligent activation, high visibility, and energy-efficient technology, active signs B-20 and B-33 are an excellent choice for road managers, municipalities, and public or private investors aiming to effectively improve road safety.
Active STOP and Speed Limit signs are modern warning systems that significantly influence driver behavior and reduce the risk of accidents.
Active B-20 STOP sign with 800 mm diameter is an innovative road safety element, powered by solar energy and equipped with a vehicle speed measuring radar. The system detects approaching vehicles and automatically activates the LED lights only when a vehicle is approaching without intention to stop or exceeds the safe speed. This ensures the driver receives a clear warning signal exactly at the moment of potential danger.
This solution eliminates the problem of drivers becoming accustomed to constantly flashing signs and allows for significant extension of operation time with solar power – the device can operate up to 120 hours without sunlight.
Key features and advantages
- Doppler radar – detects vehicles and measures speed
- Activation in both traffic directions – the sign also responds to departing vehicles
- Operation only during a threat – prevents driver habituation
- Solar power – fully autonomous operation
- Minimum 120 h operation without sunlight – excellent energy efficiency
- Low-power LED technology – high visibility and long-lasting operation
- High warning effectiveness – activation only when necessary
- Durable weather-resistant construction
- Mounting on standard road posts
Where is the active B-20 STOP sign suitable?
- Railroad crossings and sidings
- Dangerous intersections
- Areas with limited visibility
- Local, municipal, and rural roads
- Entrances and exits of industrial plants and maneuvering areas
- School zones and pedestrian crossings
This is one of the most effective and commonly chosen solutions for improving road safety – without the need for electrical wiring.
Active B-20 STOP sign 800 mm ensures maximum visibility and quickly forces driver reaction, significantly reducing the risk of collisions in critical areas.
Solar Active Roadside STOP Sign B-20
| Supply Voltage | 12/24V DC or 230V AC |
| Power Consumption (average / max) | 2 / 7.2 W |
| Ingress Protection | IP67 from the sign face |
| Dimensions | According to standard |
| Light Distribution Angle | 15–30° |
| Maximum Luminance per LED Point | 1800 cd |
| Type of Reflective Film | 2nd generation |
| Operating Temperature | -30 to +60 °C |
| Environmental Conditions | IP67 from the sign face |
| Post / Mounting | Roadside steel post or mast above the roadway |
- Possibility of a version with radar – a camera detecting direction (the sign is activated only for approaching vehicles)
