Solar-Powered Vehicle Activated Sign
Vehicle activated signs, also known as driver feedback signs, are proven to slow down traffic by alerting drivers with responsive messages reacting to their actual speed. The sign has the capability to display vehicle speed as well as simple text messages and bitmaps. The display can be customised and scheduled, and the collected speed data can be accessed remotely using our award-winning JamLogic Software.
Features
Adjustable min and max speed thresholds
Flashes if the speed threshold is exceeded
Individual bitmaps can be used
such as text messages, smiling/
frowning faces, speed limits or logos
Automatic brightness adjustment
Remote operation/data transfer option available
Long-life reliability
virtually maintenance free
The Importance of Vehicle Activated Speed Signs
A significant number of road incidents could be avoided if drivers were more aware of the speed they were travelling and the environment around them. Speed is a major factor in the severity and frequency of accidents, particularly in high-risk areas like school zones, residential streets, and work sites.
Often, drivers aren’t intentionally reckless — they simply aren’t fully aware of how fast they’re going or how quickly road conditions can change. Vehicle Activated Speed Signs (VAS) provide an immediate, highly visible reminder, triggering drivers to adjust their behaviour in real time.
By delivering targeted, dynamic feedback exactly where it’s needed, VAS signs help reduce speeding, increase driver attentiveness, and create safer roads for everyone.
Key Applications: Where are our vehicle-activated signs used?
Our Vehicle Activated Speed Signs (VAS) are a trusted solution for improving safety across a wide range of environments. Whether temporary or permanent, they’re deployed wherever controlling vehicle speed is critical.
Common applications include:
- School Zones: Protecting children and encouraging safer driving at key times of day.
- Residential Areas: Reducing speeding in neighbourhoods and improving quality of life for local communities.
- Work Zones and Roadworks: Alerting drivers to reduced speed limits and changing road layouts, helping to protect workers and motorists alike.
- Rural Roads: Providing early warnings on dangerous bends, narrow lanes, or unexpected junctions where visibility is limited.
- Event Traffic Management: Managing vehicle flow and reinforcing temporary speed limits during events to keep pedestrians and visitors safe.
- High-Risk Junctions and Accident Blackspots: Prompting drivers to slow down where collision rates are historically higher.
Wherever awareness and reaction time can make the difference, our Vehicle Activated Signs deliver clear, effective messaging to keep roads safer.
Why Mobile VMS?
Built for Performance
Every MobileVMS product is engineered for durability and reliability, delivering exceptional performance on site in all weather and road conditions.
Trusted Across the UK
As a recognised leader in vehicle activated signs and trailer-based solutions, MobileVMS is the partner of choice for contractors, traffic management specialists, and local authorities across the country.
Client-First Service
We work closely with every client and stakeholder, making sure the solutions we provide are the right fit for the project. Our focus is always on achieving the best outcomes and delivering clear, effective communication on the road.
Innovation That Leads the Way
We actively tackle real-world challenges with smart, forward-thinking solutions. Through continuous innovation, we help deliver safer, more efficient traffic schemes — and share our knowledge to raise standards across the industry.
Committed to Progress
With significant investment in new manufacturing technologies and the ongoing development of our JamLogic software, MobileVMS ensures our customers benefit from the very latest in digital traffic management systems.
FAQS
How do vehicle activated speed signs work?
Vehicle activated speed signs operate using integrated radar detection systems that continuously monitor the speed of oncoming vehicles. When a vehicle is detected exceeding a pre-set speed threshold, the sign activates an LED display to show dynamic warnings — such as the vehicle’s actual speed, a flashing speed limit roundel, or a custom message like “Slow Down.”
The radar sensor typically uses Doppler or microwave technology to measure vehicle speeds accurately without the need for ground loops or intrusive roadworks. Settings, thresholds, and messages can be configured either on-site or remotely, depending on the system.
Most modern mobile VAS units are solar-powered with internal battery backup, providing reliable, maintenance-free operation over long periods. Their real-time activation ensures that alerts are targeted only at drivers exceeding the limit, reducing unnecessary distractions while reinforcing safer driving habits. Data logging can also be integrated, enabling detailed analysis of traffic patterns and speed compliance over time.
Are they effective?
A real-world study has shown that vehicle activated speed signs can make a significant difference to road safety:
- Preventable accidents reduced by up to 31%, with areas limited to 40 mph seeing an even greater drop of up to 34%.
- Average vehicle speeds on residential roads fell by between 2.6 and 7.1 mph after speed signs were installed.
- Long-term behaviour change, with drivers continuing to comply with speed limits even a year after the signs were introduced.
