Enterprise Flasher Company

Your Traffic Safety Is Our Business

Alert Max® Portable HAR and Changeable Message Sign System



Alert Max is a system consisting of a changeable message sign and an AM Highway Advisory Radio (HAR) on a single, solar powered trailer. Text messages are displayed on a changeable message sign and audio messages are broadcast to motorists, providing drivers enough time to merge or take an alternate route.

Alert Max utilizes solar power, which provides dependable service around the clock and during extended periods of inclement weather. Messages can be changed quickly and remotely should conditions vary.

Alert Max has the ability to save messages for years with no external power source. That means no fuel, no landline utilities, no noise, no maintenance and no lost messages. Even in outdoor storage, Alert Max is charging the batteries so you can be set up and on the air in minutes.


  • AM radio is standard in nearly all vehicles
  • Allows you to inform the public 24/7
  • Combines audio and visual messages in a single solution
  • Easy to operate
  • Quick set-up
  • Portable and reliable
  • Solar powered


  • Severe weather notifications
  • Local road conditions, closures or delays
  • Emergency evacuations
  • Temporary lane closures for maintenance or construction
  • Incident management
  • Local events such as parades, festivals or tourist attractions
  • Homeland security
  • Military and defense applications


  • Simple and quick to assemble, deploy and disassemble
  • Robust design, including built-in lightning suppression
  • Meets all FCC rules and regulations
  • Weather-resistant and theft-deterrent enclosures
  • 5-year warranty
  • Portable ground system
  • Messages can be changed remotely by computer
  • On-board digital recorder preserves audio messages with no external power source
  • Power is stored in high-performance batteries
  • NTCIP compliant

Key Specifications

Power 330 to 450 watt solar panel array
Batteries Eight 12-volt DC 4-D
HAR Access/Control Local handset, remote control from any touch-tone phone, or by computer
Digital Recorder Player GPS audio synchronization
Transmitters FCC type accepted

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