Radar Signs for Highways

Intelligent radar signs alert speeding drivers on highways

Effective. Versatile. Durable. The SPEEDCHECK-18 radar speed sign is a traffic calming tool for highway and expressway applications with posted speeds 45 mph and over. Also known as driver feedback signs, these traffic calming devices are proven to show measurable results. The speed detection display sign flashes 18-inch, bright LED digits, making it easy for drivers to understand at a glance if they are exceeding the posted speed limits, and react by slowing down.


This radar speed sign includes two-way wireless communication, either onsite or remotely, for setup, diagnostics, upgrades, and more. Optional features will help to eliminate unnecessary service calls and set a scheduling function that allows for easy programming and unlimited schedules. Measure the compliance results with ease using the precise traffic data and reporting that is available for analysis.


  • Mobile app for iOS® and Android™ enables quick and easy setup and programming from up to 50 ft away using on-site Bluetooth® wireless connectivity. Cell modem, Ethernet, and other standard traffic communication options are also available.
  • Flashing digits and optional “Slow Down” message can be programmed to flash at user-defined speed thresholds—the faster the speed, the faster the flash. A high-speed cutoff threshold can also be set to prevent drivers from racing the sign.
  • Powered by AC, battery, or solar systems.

Carmanah SpeedCheck signs meet the guidance of the Federal Highway Administration’s (FHWA) Manual on Uniform Traffic Control Devices (MUTCD). Many states have SpeedCheck devices on their approved product list. It is also approved by the Transportation Association of Canada (TAC) and other safety bodies around the world.

STUDIES SHOW: According to a 2008 report from the Transportation Research Board, radar signs had a mean speed reduction of 1.7 mph in high-speed locations.


Top 3 reasons the SPEEDCHECK-18 radar signs are better than the competition:

  • Unique safety masking ensures the numbers are only visible from the front (up to 3 lanes across), preventing drivers from rubbernecking to read it as they drive past.
  • 7-segment design improves legibility from a distance.
  • Ultra-clear contrast delivers superior viewability in bright sunlight, with no “88” character ghosting.


Superior Visibility

These images were taken during a side-by-side test.

competitor radar speed sign with "ghosted" digits, making it harder to read
Displays faint red “25” with ghosted “88” characters
speedcheck radar speed sign with superior display, ultra clear contrast for digits make it easier to read
Displays bright, curved “26” against deep black contrast


Software for radar signs

SpeedCheck Manager

The SpeedCheck Manager software allows you to easily set up, program, update, and perform maintenance on your radar speed sign. It can be accessed locally with Bluetooth or remotely using an Ethernet connection. If your system has external devices, such as beacons or cameras, you’ll configure them here. Read our Manager spec sheet for more information.

SpeedCheck Scheduler

Ideal for school zone applications and anywhere a set schedule is desirable, the SpeedCheck Scheduler is included with SpeedCheck Manager and allows you to program and manage schedules for multiple signs, from simple on/off functions and data collection times to the operation of external devices like flashing beacons and cameras. This easy-to-use scheduler lets you set up to 16 unique events per day over two years. Read our Scheduler spec sheet for more information.

SpeedCheck Traffic Analyzer

When enabled, the radar on SpeedCheck signs can be used to collect the date, time, and speed of over 200,000 vehicles. You can connect to your SpeedCheck display any time and download this collected traffic data. SpeedCheck Traffic Analyzer lets you plot the data, see the success of your traffic calming programs, and identify areas for improvement. Read our Traffic Analyzer spec sheet for more information.


We put solar to work

We can help you determine the best power supply option for your specific needs. If solar power is the way to go, the experts at Carmanah can help you find the exact solar power solution required to ensure not-stop, trouble-free operations under any circumstances. We run a field-proven software simulation to create a Solar Power Report™ to show you how we did it. Best of all? It’s free, and we can have it ready in 24 hours.

Configuration Options


Remote Connectivity

We partnered with leading intelligent transportation systems (ITS) solutions provider Applied Information to develop StreetHub™, a portfolio of beacons and signs that leverages cellular technology to allow authorized personnel to remotely monitor and control their complete network from a single easy-to-use web-based platform. With StreetHub, you can set and adjust schedules the schedules of your SpeedCheck systems from anywhere, plus collect data, manage alerts, monitor battery health, and more—all without having to make a manual site visit. Click here to download the SPEEDCHECK-HUB specification sheet.  

"YOUR SPEED" Sign Size and Colors

The SpeedCheck-18's static sign comes in a variety of colors for a variety of applications. The standard sign sizes is 48"x36". There are also four sign colors available based on MUTCD guidelines. If you'd like to learn more about MUTCD guidelines for radar speed signs, read our quick guide here.
speedcheck-18 white sign White (not MUTCD standard)
speedcheck-18 yellow sign Yellow (used for most applications)
speedcheck-18 fluorescent yellow-green sign Fluorescent yellow-green (used for school zones)
speedcheck-18 orange sign Orange (used for work zones)

Product Configurator

Imagine the possibilities

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