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Vehicle Activated Speed Signs

Speed Indication Devices

VAS (Vehicle Activated Signs)

Vehicle activated speed signs, or VAS, provide highly visible warnings and caution messaging to drivers exceeding or close to the speed limit or above a preset tolerance when approaching a hazard, controlled zone, or area of caution, such as a work site, steep incline, school, or residential environment.

Using vehicle detection improves effectiveness by a dramatic margin, where drivers are notified that their speed has been monitored and calculated, improving adherence with safe driving requirements, speed reduction zones and traffic calming measures.

While signage models have variable functions, from speed indicators to limit reminders and ‘smiley faces’ to thank drivers who do respect the speed limit, the key is in LED-lit messaging that is impossible to overlook or ignore and customisable displays based on driver behaviour.

Download data sheet

Download the Mini300 data sheet

Key benefits

  • Virtually no maintenance
  • High performance LED output
  • Lightweight robust polyethene casing
  • Quick and easy installation with aluminium clips on the rear
  • Compliance with TSR&GD standards

Product options

  • Tri-colour
  • Multi-coloured
  • Multi-functional speed limit sign
  • Welsh DSD Speed Display Sign
  • Mini 300
  • DSD Speed Display Sign
  • GPS option allows accurate speed data to be collected and linked to specific locations
  • Solar powered option
  • Optional data recording facility
  • Optional remote access facility
  • SLOW DOWN safety message option
  • Sad/Smiley face option

Our Speed Activated Signs

Speed Indication Devices

Applications for Vehicle Activated Speed Signs.

Although vehicle activated signage is common in specific areas, such as close to schools and childcare settings, in high-traffic routes monitored by speed cameras, and for drivers navigating high-speed major roads that transition into controlled, slower through routes, it is enormously beneficial in a much wider array of placements.

  • Private Businesses and Industrial Parks: Excessive speeds can pose a major threat in areas with a prevalence of HGVs and slower-moving commercial vehicles. Vehicle activated signage can be customised to warn drivers and reinforce controlled speed restrictions.
  • Villages and Parish Councils: High-speed driving is an ongoing concern for myriad villages and smaller residential towns, particularly those with A-roads that connect town and village centres with busy transport routes. Vehicle activated signs improve driver awareness of changing speed limits and improve compliance.
  • Public-Access Environments: Schools, hospitals, retail parks and leisure complexes often use vehicle activated speed signs to encourage site users and visitors to drive responsibly, respecting the need for slower maximum speeds in areas with children, older adults and visitors with restricted mobility for whom fast moving traffic is a safety risk.
  • Construction Sites and Work Zones: Traffic management is essential for workforces operating close to highways or public roads or within industrial parks and developments. Signage that tracks and calculates driver speeds can form part of a site-wide safety policy and ensure drivers are firmly aware if they are exceeding the limit.

Vehicle activated speed signs can also be used in any alternative location where high-speed traffic, reckless driving, or regular instances of vehicles exceeding the speed limit or driving too fast for the conditions of roadway features need to be proactively controlled.

Speed Indication Devices

Explore Our Vehicle Activated Speed Sign Products

We provide a diverse range of speed signage, some used within general applications in highways and commercial spaces and others for specific uses close to schools, controlled zones, and crossings.

Mini Matrix

As an advanced and adaptable vehicle-activated speed sign, the Mini Matrix can display multiple warnings or cautions. It is ideal for environments where managers or supervisors need the flexibility to use one signage placement to provide comprehensive warnings, including monitoring vehicle speeds and heights.

Speed Indicator Devices

This type of vehicle-activated sign accurately detects the speed of any vehicle and can display a relevant message, acknowledge safe and responsible driving, or caution drivers who are travelling above the speed limit or outside of temporary speed restrictions due to hazards or conditions.

Speed Control Signs

Bright, high-performance LED speed detection signage can identify the speed of any approaching vehicle. It features slow-down safety messaging to instruct drivers to reduce their speed, optional alternating safety messaging, and radar or loop activations to adapt to the setting or environment. (Read more about radar speed signs here).

More information and specifications of these vehicle-activated speed signs and comprehensive data sheets are available from the relevant product pages.

Key Features

  • Robust, compliant road safety signage adapted to your requirements and setting
  • Commercial-grade materials and casings for always-on functionality
  • Weather-proof vehicle-activated speed signs with high-visibility LED displays
  • Lightweight signage that can be mounted or installed in any position
  • Minimal maintenance responsive speed detection and safety signage
  • Accurate, autonomous vehicle-activated speed signs with adjustable programming

Product Options 

Custom settings to detect speeds within any required tolerance, or to adjust speed warnings based on data points such as the time of day or congestion

Static, continual or varied messaging and displays based on hazards, conditions, vehicle heights and driver speeds

Wired or solar-powered vehicle-activated speed signs with remote control access

Compatible and networkable models that can integrate with other road safety infrastructure or access control systems

Multi-messaging signage options or simplified warning signs with familiar warning symbols and shapes for easy communication

Speed Indication Devices

How Can We Help Slow Down Traffic? 

Vehicle-activated speed signs are powerful assets in traffic calming measures and provide numerous functions that can help to improve driver awareness, reinforce instructions about safe driving speeds, notify visitors of approaching hazards, and inform drivers that they are being monitored.

published real-world study found that vehicle-activated speed signage delivers:

  • Reductions of up to 31% in preventable accidents, with greater improvements in areas with speed limits of up to 40 MPH, with a drop in collisions of 34%.
  • Average drops in speeds on residential roads of between 2.6 to 7.1 MPH following the installation of speed detection signage.
  • Continued compliance, with drivers remaining within the speed limit over the long term and adhering to speed limits one year after signage installation.

The functionality of radar detection ensures that messaging is relevant, contextual and accurate, where drivers are prompted to consider their speed, recognise if they are exceeding the speed limit, and respond accordingly to remain safe.

Frequently asked questions


How Do Vehicle-Activated Speed Signs Work?

We offer a wide range of intelligent and advanced speed detection and warning signage models, with many incorporating radar technology which can precisely record the speed of an approaching vehicle of any size.

That data can then be used in traffic management or prompt adapted messaging displays, advising the driver of their current speed, instructing them to slow down, and reiterating the maximum speed limit in controlled zones, such as temporarily lower maximum speeds outside schools. Read more about our slow down signs here.

How Well Do Vehicle-Activated Speed Signs Work to Reduce Average Speeds

Anecdotal evidence shows that in city settings, vehicle-activated speed signage helped provide significant reductions in excessive speeds and potentially dangerous driving, with outcomes including accident reductions of over 30% in all areas.

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