InstAlert Variable Message Sign

InstAlert Variable Message Signs

The most portable, durable, and easy-to-use traffic message boards available. See how our customers are using our message signs for their COVID-19 response.


Rapidly display custom messages wherever they are needed.

  • Lightweight and portable: Weighs just 43 lbs., and is the only variable message sign on the market that folds in half to easily fit in the trunk of a vehicle.
  • Quick and easy to set up: One person can deploy and take down in a couple of minutes.
  • Simple, universal mounting: Mount our portable changeable message sign on a portable post, pole, trailer or vehicle hitch.
  • Durably built in the USA: welded aluminum enclosure, concealed mounting hardware, shatterproof Lexan and graffiti-resistant powder-coat make InstAlert extremely rugged in any weather and built to last for over a decade. Complies with the Buy America Act and the Buy American Act.
  • Flexible Power Options: Accommodates almost any power source including Lithium battery, Integrated Solar, AC or trailer.
  • Extremely versatile: Display up to six screens of custom text, chevrons, and/or images.
  • Share emergency alerts, traffic information, travel times, detours, parking and event locations, weather updates, pedestrian crossings and more

Access and monitor InstAlert from anywhere with TraffiCloud®:

Program your portable variable message signs from your office, home, or on the go using ATS TraffiCloud web-based software.

  • Change multiple signs’ messages simultaneously: Update one or all of your portable vms sign messages in almost real time with just a few clicks from your computer, tablet or phone*.
  • Smart scheduling: Schedule messages in advance for specific days and times.
  • Conditional Messaging: Display different messages based on live inputs from any sensor or data source such as surface or air temperature, water levels, weather alerts, timer values, and parking availability.
  • Receive Alerts: Set email or text alerts for low batteries and tampering. for all of your variable message signs*.

*requires TraffiCloud subscription. 

Request More Information:

InstAlert disassembles fast
and folds in the trunk—watch how easy it is!


View and Download Spec Sheets

[InstAlert] has been the most requested asset that we have in our arsenal.

– Keenan Campbell, Director of Bureau County EMA

I like [InstAlert]… they’re sturdy, they’re durable, and they hold up.

– George Willoughby, Purchasing/Logistics Supervisor, Virginia Department of Health

Being able to have that ability, literally within 10 minutes I can change the message sign…it’s instantaneous…it’s the versatility on a dime that’s just so, so helpful for us.

– Sgt. Trent Stephens, Pierce County EMA

InstAlert Variable Message Sign

Control Interface

TraffiCloudTraffiCloudMore Info

TraffiCloud Features

  • Control equipment from any internet connected computer
  • Multiple users can be set up with permissions to control signs or just to access reports
  • Cloud-based, turnkey – no IT required. 
  • TraffiCloud Traffic Suite subscription includes Premier Care perpetual warranty
  • Contact us for information 
  • Learn more about TraffiCloud
ATS MobileATS Mobile More Info

ATS Mobile Features

  • Your Android device or ours
  • Many sizes available
  • Automatic upgrades
  • TraffiCloud Traffic Suite subscription includes Premier Care perpetual warranty
  • Traffic Data synced to server for free
PCPC More Info

PC Interface Features

  • Web based – you always have the most current version
  • Limited version of TraffiCloud (upgrade to TraffiCloud service anytime and collected data is available)
  • Use online or offline
  • Bluetooth or USB connection to the sign
On-BoardOn-Board More Info

On-Board Controls

  • Critical settings right on the unit
  • No extra device required in field
  • Intuitive control – easy to use
  • Tamper proof


Lithium (SA 18 only) Lithium More Info

Lithium Batteries

  • Compact with high energy density
  • Lithium Iron Phosphate technology – safe and up to 1000 recharge cycles
  • 10 Ah and 16 Ah versions available, units fit up to 2 (Shield 12 accepts 10 Ah only)
  • One connector fits Shield and charger
  • 3A automatic charger, 100-240VAC input
PowerCase PowerCase More Info

PowerCase PC36 / PC26

  • PC36: 36 Ah capacity, about 30 hours sign use (left in picture)
  • PC26: 26 Ah capacity, about 20 hours sign use (right in picture)
  • Built in 6Amp charger
  • PC36 includes inverter for on vehicle charging
  • Watertight, high visibility, high impact case
  • Receptacle for InstAlert or SpeedAlert plug built in
SolarSolar More Info

Solar Panel

  • 40 or 60W Panels – Let us size your panel
  • Solar controller to prevent overcharging battery
  • Adjustable mounting bracket and wiring included armored wire casing available
  • Uses sealed lead acid batteries (Solar charging Lithium batteries not recommended.)
  • IA18 or SA18 easily removable from solar enclosure to move to another location
  • Contact us for system sizing and installation tips
ACAC More Info

AC Power

  • 120 or 220VAC input; 6A 12VDC output
  • Waterproof enclosure
  • IA18 and SA18 easily removable from AC supply to move to another location
  • Surge suppressor installed
TrailerTrailer More Info

Trailer Power

  • Two battery capacity options – 235 Ah or 470 Ah
  • Flooded Deep Cycle batteries
  • Solar Options – 60W, 80W or 120W panel
  • Vented, locked cabinet, armored wire casing available
  • Built in potted 10A charger with AC input external to battery box


Pole Bracket –  SA18Pole Bracket More Info

SA18 Pole Bracket

  • One included with each SA18
  • Mount with carriage bolts, banding, lag bolts or U-bolts
  • Tamper resistant – bracket prevents access to hardware, controls and batteries
  • Easy mounting with push lock on SA 18
  • Purchase extra brackets and put one in each location to make moves even easier
Pole Bracket – IA/SA 24 Pole Bracket More Info

SpeedAlert 24/InstAlert or SpeedAlert 24

  • Batteries – 235 Ah or 470 Ah
  • Flooded Deep Cycle batteries
  • Solar Option – 60W, 80W or 120W panel
  • Vented, locked cabinet
  • Units can be removed from trailer and used with standard mounting brackets
Portable Pole Pole More Info

Portable Post

  • Easy to fold
  • Lightweight
  • Stable
  • Uses standard mounting bracket
Hitch Mount Hitch More Info

Hitch Mount

  • Fits 1 1/4″ or 2″ Receiver
  • Unit runs on internal batteries or vehicle
  • Secure – can be locked to vehicle
  • Mounts using standard pole bracket
  • Telescoping version available


Padded Carry Case 9SA18 Bag More Info

SpeedAlert Padded Carrying Case

  • Padded case protects SpeedAlert during transport
  • Pockets for accessories
  • Shoulder strap included