Information Station Specialists is the best known source of travelers information stations, highway advisory radio, advisory signs and services needed to reach motorists with public service information. Learn more about Information Station Specialists.
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The HPR.0990 AM Radio High Performance Antenna is the heart of the RadioSAFE System.
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Case Studies

"Waldo County EMA Becomes the First to Deploy a New Wide-Area Public Information Radio Service"
Authored by Bill Baker, published by IAEM, Feb 2020

"Covering the County When it Counts: an AM
Radio Emergency Broadcast System"

Authored by EMD Dale Rowley & AAIRO Pres Bill Baker
Published by ICMA, May 2020

HPR.0990 installed in Waldo County, Maine.

Wide Area Emergency Radio Broadcast Systems

FCC-Licensed Travelers' Information Station / Highway Advisory Radio
AEL/SEL Category 04AP-09-ALRT
A RadioSAFE Wide Area Emergency Radio Broadcast System is a community’s safety net – a key resiliency asset that can be called up during a major incident to direct citizens in evacuation, preservation of life and property and/or disaster recovery. The service is licensable by any government entity in the United States and is permitted to transmit any emergency information that local authorities deem necessary to mitigate harm. Are you prepared to use available broadcast channels to directly inform and instruct the public in your county during incidents when other communication and power sources are rendered inoperable? If not, make your community RadioSAFE.

RadioSAFE is available in three formats, detailed below and on the linked planning page.
Application Examples
  • Evacuations.
  • Incident responses / recoveries.
  • Infrastructure failures.
  • Loss of power / communications due to natural or human-initiated disasters.

Above, RadioSAFE (RSF.500:10X) signal coverage of up to 20-mile radius is possible with an emergency authorization from the FCC.

Variables that affect coverage are authorized power level, terrain, ground conductivity and frequency.

Predicted coverage is part of the RadioSAFE engineering documentation package.
Maximum Range  RadioSAFE RSF.500:10X is a special radio station that typically operates at 10 watts for enhanced 7-10 mile range – until required to ramp up in an emergency. With the substitution of its high power transmitter, the system is capable of signal coverage that blankets an entire county or major city. A signal radius of 20 miles or more is possible. An emergency Special Temporary Authority (STA) must be granted by the Federal Communications Commission to permit initiation of the RadioSAFE service at enhanced power – which may be hundreds of watts. See map, left.

Enhanced Range  RadioSAFE RSF.10X operates at 10 watts and with expanded field intensity limits (per waiver) to produce a much larger coverage pattern – 7-10-mile radius – than normally permitted by FCC rules.

Local  Area Coverage  The RadioSAFE RSF.10L System is more compact yet, with a signal range of 3-5 miles that makes coverage ideal for more modest-sized communities. It operates at up to 10 watts and within the conventional signal limitations of the Travelers Information (TIS) service. Like the other RadioSAFE systems, it utilizes the high-efficiency RSF.0990 Antenna so that an upgrade to larger coverage is a potential in the future.
Information Station Specialists provides the application documentation for emergency STAs, waivers and other licensing services required. Frequencies that are adequate for RadioSAFE operation are not available universally. Check with us regarding availability in your area.

RadioSAFE Broadcast Systems operate on AM channels because of their nearly universal availability and because AM signals travel a much greater distance than FM signals at a given wattage. AM radio signals have long wavelengths that are less likely to be blocked by terrain and tall buildings. And more importantly, AM antennas can be installed at relatively low profiles (50’), making them relatively inexpensive to install and dramatically less vulnerable in high wind or geophysical events that can render tower-based communications inoperable.
Communication Strategy

In a disaster in which grid power is severed and mobile devices are not functional, a RadioSAFE Broadcast System might be the only means of reliably getting critical information to members of the public, who are likely to have functioning battery-powered radio receivers in their vehicles.

RadioSAFE Broadcast Systems have the capability of staging hundreds of preplanned safety messages that can be selected locally or remotely at a moment’s notice and updated minute by minute. Programming can be performed at the station or remotely via telco or UHF/VHF transceiver or by LAN/WAN if optioned. Redundant levels of message control are provided in the RadioSAFE design.

Emergency officials can employ conventional methods of promotion, such as websites, media articles, commercial posters and local signage, on a day-to-day basis to provide visibility for the service so local populations have residual awareness of the special emergency frequency in their specific area. If possible, we recommend that a RadioSAFE station operate at 10-watt power 24/7 and that the public be encouraged to identify it in advance to “set a button” on vehicle radios so they can quickly find the channel when needed.

During emergencies, officials typically alert citizens to the availability of the RadioSAFE service via electronic notification / social media, Portable Changeable Message Signs (PCMS) or flashing beacon / LED signage installed along highly traveled roadways. The higher the public’s awareness of the emergency frequency’s presence, the more likely word-of-mouth will become a powerful ally when its content is critical.

See "Planning a RadioSAFE System."

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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Fax 616.772.2966, Email Form

The USA's best known source for information radio station equipment, related products and technical services.

 Trademarks: 2X Signal Booster, ALERT AM Emergency Advisory Radio System, ANXX AM Radio Antenna, AP55 Digital Message Player, ENcast Emergency Notification Broadcast System, FAS6000 Flashing Beacons & Controller, FASTrack Quick-Erect Sign, FlashCAST Internet Broadcast Service, Flashing ALERT Sign System, FlexPlane Factory-Assembled Groundplane, Free-Radiate On-Premise Radio Broadcast System, HearMoreInfo Internet Broadcasts, HPR0990 High Performance Antenna, i A.M. Radio Transmitter, Information Station Specialists, InfoRadio Format, Information Station Classic, Information Station IP, InfOSpot License-Free Radio Station, IP8 Digital Message Player, IP76 Digital Message Player, ITS6000 Highway Advisory Radio Network, LIGHTNING LED Portable Changeable Message Sign, NX8R Digital Message Player, Potential Interference Notification Services (PINS), EventCAST Portable Information Radio Service, RadioSAFE Wide Area Emergency Broadcast System, RadioSTAT Portable Emergency Advisory Radio Station, Severe Storm Detector, Signal Measurement Radio Receiver, Stealth Sign, StreamCAST Internet Broadcast Service, SS3000 Free-Standing AM Radio Antenna System with Tower, Stylized ISS Logo, SX200 Wattmeter, Talking House AM Radio Transmitter, TR6000 Transmitter Model HQ5.0, TR6000 Transmitter Model 15.73, VoiceStar Portable Highway Advisory Radio Station (with or without Changeable Message Sign), VP9000 Vertical Profile Antenna Support and Grounding System, Wireless Audio Link.

Information Radio Stations is a generic term synonymous with Travelers Information Stations (TIS), Highway Advisory Radio Stations (HAR) / Highway Information Systems & Low Power Radio Stations (LPR). Operation of the stations is governed by FCC Part 90.242 Rules. A FCC license is required. Information Radio Stations may be fixed or portable. Subcomponents may include transmitter, antenna and ground system, digital voice player, wateter, cabinet with conventional or Corbin locks, lightning arrestors for RF, power and telephone lines, coaxial cable. Most stations employ black maximized antennas to discourage ice accumulation and security measures to prevent unauthorized program access. Options include synchronization, battery backup, solar power, remote programming by local, network or telco, multi-station audio distribution via RF or LAN / WAN or wireless network.