Alertus / Tunnel Solutions

Mass Notification for Tunnels

Enhance Notification Reach And Effectiveness With Audible And Visual Notification

Alertus understands the importance of providing audio and visual notification within challenging structures such as tunnels. In addition to the problematic acoustic conditions a tunnel presents, there are also network, structural, and environmental challenges.

Improve Safety and Communication

Alertus has created a comprehensive audible visual solution, including fully integrated speakers and strobes that improve safety and communication in mining, pedestrian, railway, subway, and highway tunnels. 

Alertus’ speaker systems utilize strategically placed loudspeakers installed along the length of each tunnel. The speakers are connected to a network of remote terminal units empowering tunnel operators or authorities to broadcast clear, pre-recorded messages, live announcements, or text-to-speech messages. Possible alerting scenarios include traffic conditions, terrorist attacks, accidents, evacuation orders, shelter-in-place, flood alerts, gas releases, lane closures, speed limits, emergencies, or general announcements.

Groups of people walk through a tunnel with Alertus' strobes and 150 Watt Horn.

The Alertus System’s audible and visible notification methods can help you overcome unique notification challenges, including: 

  • Weak or no cellular reception

  • No existing PA or other communication systems

  • No 24/7 staffing or consistent oversight

  • Difficult to reach areas in case of traffic accidents or blockages

  • Road signs blocked or damaged

  • Loud, dangerous environments

  • Reaching individuals with auditory or visual impairments

  • Difficulty reaching people in vehicles who need to egress during emergency

 

Clear Intelligible Voice Messages

In emergencies, the tunnel notification speaker system plays a crucial role in quickly disseminating important instructions and evacuation procedures, even in the presence of high noise levels to ensure the safety of tunnel occupants.

To optimize sound dispersion and overcome acoustic challenges, our speaker solution is equipped with advanced audio processing technologies and audio drivers capable of reproducing a large band of the audio spectrum. The placement and design of your sound system will also greatly affect voice intelligibility.

Our team of engineers has years of experience strategically placing speakers and strobes to ensure clear voice and highly visible alerting apparatus.

Audible Notification with the HPS 150 Watt Horn

The Alertus 150 Watt speaker is an exponential horn made out of an aluminum alloy to survive harsh environments. Our high-quality audio driver is enclosed in an easy-to-access back cap and can be screwed in and out similarly to a lightbulb. Each speaker can be installed on a 3.5” O.D. mount, providing an easy method of installation in just about any location. An optional bug screen can be added to prevent unwanted nesting and blockage of the speaker horn.

  • Clear tone and intelligible voice messaging 

  • Pointed in the direction of traffic for clear announcements

  • Lightweight for easy installation

  • Aluminum alloy makeup for harsh environments

  • Horizontal line arrays can be created for larger tunnels by using two speakers

 

HPS 150 DIMENSIONS & SPECIFICATIONS

Operating Mode 35 volt 8 ohm standard
Operating Environment Indoor or outdoor
Frequency Response 300 - 8000 Hz
Operating Temperature -40°C to 86°C [23°F to 131°F]
Wattage 300 Watts (x2 150 Watt Channels)
Weight 8.62kg [19lbs]
Material Aluminum alloy
 

Audio Amplification System 

The Alertus speaker system can operate at 35 Volts 4 / 8 ohm or, with the addition of step up transformers, 70 or 100 volts. The type of system specified will depend on the application. Alertus can help your team decide the correct type of speaker needed for each alerting area.

Enhance Tunnel Notification with Visual Alerting

Alertus Text-to-Speech technologies

Outdoor strobes

In the unique case where a standalone audio notification solution would not suffice, Alertus offers additional visual appliances that enhance the awareness of those in emergency situations. Horns and speakers are loud enough for people in their vehicles; however, adding strobe integration provides additional awareness that ensures clear, calm, and efficient alerting during accidents and construction.

  • Easy Install: Terminals designed for easy wiring allowing for a simple installation right out of the box

  • Various Options: Available in two versions, flashing and steady-on

  • Agency Approval: UL and cUL listed

  • Unobtrusive Design: Blends in when not in use

  • Used Everywhere: Indoor and outdoor versions available

  • Durability: The base is manufactured from 33% glass-filled nylon, high heat, and high chemical resistant, shatter resistance lens