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Flashing ALERTTM Sign System
  Flashing ALERT Sign  
  AEL/SEL Category 03OE-03-SIGN  
Wireless ● Remote Controlled ● Solar Powered For Streets/Roads with Speed Limits below 60 MPH
Flashing Sign in Avalon, NJ
Emergency Use in Avalon, NJ
Ultra-visible from more than 1000 feet – even in daytime – Flashing ALERT Signs grab attention with their bright embedded flashing LED beacons. Communities, military bases and industries often use the signs in conjunction with Information Radio Stations to announce urgent message broadcasts. But the signs may also be used independently, e.g., to announce detour routes and emergency actions when beacons activate.

Flashing ALERT Sign Systems may be custom designed for each application with varying power and control methods, sign text, colors and mounting styles and may be installed apart from electrical power services, which keeps installation costs low. 

System operators trigger beacons to flash via one of a number of wireless control methods, e.g. UHF, VHF, paging, SMS/cellular, wireless modem. Bright, amber LEDs command immediate attention when activated. When beacons are off, colored panels display 24/7.
Flashing Sign in Middletown, NJ
Flood Use in Middletown Township, NJ
Flashing ALERT Signs store enough flash-power to run 4 to 10 days even with no sun. With as little as 1.5 average sun hours per day, each sign's backup battery system remains fully charged around the clock. 

Within each sign location, up to four Flashing ALERT Signs may be connected to and controlled by a single Remote Control Power Unit via wire line. For example, two Flashing ALERT Signs could be placed on a busy thoroughfare, one facing each traffic direction; another pair could be placed on two busy streets that intersect that thoroughfare.

Flash patterns and sign colors comply with the Department of Transportation/Federal Highway Administration Manual on Uniform Traffic Control Devices (2004, Regulation 2A.08). (Check with street department and highway authorities to coordinate compliance with local/state regulations governing signs in your area.)
Technical Specifications  
Sign Panel

  • Typical size: 44” high by 24” wide, customizable (price relates to size).
  • Composition: natural aluminum, standard 1/16” gauge reflective black/ yellow/blue, high intensity prismatic sheeting; customizable black/white, 2” and 3” high lettering.
  • Mount: universal L-bracket for banding, bolting to existing poles or posts.
Sign Electrical
  • LED beacons: 2, amber, weatherproof LED beacons; 41 diodes each; 4.25” diameter embedded reflectors.
  • Current draw: 100 milliamps.
  • Flash controller: 8A, 50/60 fpm, waterproof.
  • Duty cycle: 50% flash.
  • Operation time: 2-4 day flash via solar power without sunlight.
Remote Control & Power Unit Cabinet
  • Size: 20” high x 16" wide x 10" deep.
  • Construction: NEMA4X, natural aluminum, single-hinge door, hasp-lock-in closure; weatherproof external antenna connector, wiring, ports.
  • Mounts: external tabs for universal mounting to existing poles or posts.
  • Solar panel: typical 40-watt, 2.40-amp at 12-volt DC, 38.38"x12.13".
  • Solar panel mount: side-of-pole, band or bolt-on.
  • Solar controller: 6-amp current capacity, LED charge indications.
  • Low voltage disconnect circuitry.
  • Battery: 55AH, AGM, sealed type.
  • Capacity: up to 4 flashing signs.
  • Control wiring: #14 AWG, each a maximum of 1000 feet from the controller.
  • Receive frequencies/ranges: 33-50 MHz (VHF low), 150-170 MHz (VHF high) and 450-470 MHz (UHF).
  • Control codes: up to 6 simultaneous codes.
  • Code formats: DTMF (up to 12 digits); 2-tone sequential, single-tone 0.3-3.0 kHz.
  • Programming output: SPDT relay with programmable timer; laptop programming via RS232 port and Windows-based software.
  • Indicators: “ALERT received” LED indicator.
  • Speaker: 4” integral.
  • Test diagnostics: built in with LED indicators.
  • External antenna: 50-ohm BNC connector.
  • Alternate control methods: commercial paging (POCSAG/FLEX); LAN/WAN; WIFI; 27 MHz (unlicensed), SMS (text).
Custom Versions

Customized Flashing ALERT Signs may retrofit existing warning/evacuation signs to notify drivers when an event is imminent.


  • Hurricane.
  • Volcanic.
  • Nuclear.
  • Tsunami Evacuation.
  • Fog.
  • Flood.
  • Lightning/Storm/Tornado Warning.

Flashing ALERT Sign Retrofit ExampleEvacuation signs tend to blend into local environments − especially for residents and regular commuters − but get noticed when their beacons begin to flash.

See the unusual story of how the custom sign, left, came to be.
Flashing Sign Control Methods Comparison
Method 3rd-Party Carrier Requires Existing Infrastructure Controls Signs in Subgroups Controls Signs via Web GUI Status Feedback Is Provided Added Hardware Costs
Using DTMF 2-Tone
No Yes, Requires UHF/VHF Coverage at Sign Locations on Available Frequency Yes No No No
Commercial Paging Yes, Flat Monthly No Yes With Additional Software No No
Cellular SMS Yes, per Location No Yes Yes Yes No
LAN or Wireless
Yes, only if 3rd-Party LAN or Wireless Provider Is Used Yes, Network Must Be Accessible at All Sign Locations Yes Yes Yes Yes, if Wireless
Cellular DTMF Yes, per Location No No No No Yes
Quote Links
Bill Baker can provide a formal quote based on your application. An illustrated instruction manual comes with the product. We offer technical support for the life of the product 24/7.