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Over Height Vehicle Detection
and Warning Systems
(OHVDS)
Trigg Industries, LLC
©Copyright 2015 Trigg Industries International, INC – All right reserved
What Does Trigg Industries’ OHVDS Do?
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Detects over height vehicles and activates visual and aural warnings
Directs driver to take appropriate action
Can notify traffic-monitoring stations, law enforcement or IT control
points via landline or wireless
Applications
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Bridges
Tunnels
Overpasses
False Work
Weigh Stations
Parking Structures
Airports
Corridor Management
Why use an Active System
for Over Height Protection?
Active Systems Provide
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Continuous active monitoring of traffic
Warnings that are triggered only as needed
Focused attention to hazard
Protection against inaccurate load height determination
and varying factors (resurfaced roadway, load
protrusions, shock height, etc.)
Secondary warning(s) beyond existing signage
Reduced exposure to costs associated with incidents,
emergency response, injury, traffic delays, loss of
revenue, infrastructure repairs, administrative costs and
publicity
Our experience has shown
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The cost of one incident or accident almost
always exceeds the cost of a Trigg Industries
Over Height Vehicle Detection System
Characteristics of Technologies Available for
Over Height Detection
Hanging chains or beams
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Driver may push than impact low clearance
Impact beam systems can fall onto roadway
Loads may be knocked or dragged from
truck into roadway
Beam or chain impact may create adverse
driver reaction
Do not integrate with other warning or
notification devices
Do not advise driver of alternative routing
Reflective Systems
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Reliability dependent on cleanliness of reflective surface
Loss of beam power in fog, rain or snow conditions
Not generally considered DOT grade technology
Susceptible to false alarms
Characteristics of Technologies Available for
Over Height Detection (cont’d)
Lasers
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Difficult to achieve and maintain alignment as beam width does not allow for
normal environmental conditions such as wind and minor geophysical disturbances
Lasers with adequate weather penetrating capabilities are generally considered
unsafe for DOT applications
Incandescent Light
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Lamps require frequent monitoring and replacement
Creates noticeable distraction to drivers
Types of Trigg Industries Over Height Detection
and Warning Systems
Infrared Models
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Good penetration of rain and fog
Invisible light source
Requires only 8 degree sun angle clearance
Visible Red Models
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Good penetration of rain and fog
High rejection of stray or intrusive light
Requires only 8 degree sun angle clearance
Does not cast visible beam
Patented Z-Pattern Red/Infrared Models
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Not susceptible to sun blinding
Maximum reliability, fault reporting
Operates in most adverse weather and
environmental conditions
Types of Trigg Industries Over Height Detection
and Warning Systems
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Full range of choices for cost effective match of system to
application
Easy to install, detailed instruction manual, technical support
as required
Proprietary cabinet design, weather and vandal resistant
Minimal or no maintenance required
One Year Standard Warranty, extended warranties available
Available Options Included
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Climate control
Fault protection
Solar powered systems (DC)
Loop detection interface
Landline or wireless notification
Camera interface/35mm
Custom options available
Patented Dual Beam Z-Pattern Technology
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Most advance weather and
environmental protection available
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Enhanced detection of small and fast
moving objects
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Eliminates false alarms from sun
blinding
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Rejection ambient, stray, or reflective light
from emergency vehicle light systems
Heaters prevent snow build-up on windows in
front of transmitter and receiver eyes
Transmitted signal strength and excess
receiver gain allow systems to operate in
challenging weather and dirty environments
Selecting the Most Cost Effective Trigg System
Appropriate for the Application
Documentation available online for
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Site Selection Criteria
Product Selection Matrix
Worksheets of Suggested Specifications
Product Specifications in .PDF format
Additional services/documentation available
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EQD: Equipment Quality/Performance Demonstration
FAT: Factory Acceptance Testing
Custom On-site Acceptance Test Procedures
Installation, Operation and Maintenance Manuals
Advantages of Working with Trigg Industries
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Direct contact with manufacturing for planning, design, bid and technical support
Factory and On-Site Acceptance Testing Documentation
Most established reputation in over height detection since 1965
Trigg Industries History
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Industry Standard – System most specified by
Highway and Bridge Departments for over 50 years
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Proven Reliability – Most field proven system;
developed and refined since 1965
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Many installations have been in operation over 30
years with little or no maintenance
Trigg systems protect hundreds of major
infrastructure projects, including tunnels, bridges,
airports, parking structures, weigh stations,
equipment yards and terminals
Trigg Industries Innovations
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First DOT Grade Incandescent System
First DOT Grade Infrared System
First DOT Grade Visable Red System
First Patented mixed red/infrared system
First event capture camera interface
First loop detector interface to over height
Quality Control Standards and Laboratory
Certifications (Models 3401, 3402, 3403)
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CE Mark
ISC/IEC Guide 22
Compliance
NEMA 3R Cabinet
Enclosure Rating
CALTRANS (California
DOT) Power Line Spikes
CALTRANS Hi/Lo Voltage
parameters
Contact Us
Trigg Industries, LLC.
716-B Bluecrab Rd
Newport News, VA 23606
TEL 757.223.7522
FAX 757.223.7317
Applications:
kathy@triggindustries.com
sean@triggindustries.com
www.triggindustries.com