Clearer Warnings,
Safer Responses.
Dynamic Variable Intensity™ (DVI™) and Vehicle-to-Vehicle (V2V) Sync technologies work together to enhance nighttime safety, protecting first responders and minimizing risks with innovative, intelligent warning systems.
Real Challenges, Real Solutions
From reducing nighttime disorientation to strengthening fleet-wide situational awareness, Whelen’s advanced technologies are purpose-built to protect your team when visibility is at its lowest.
Dynamic Variable Intensity™ (DVI™)
Traditional flashing lights can cause disorientation and dangerous glare at night. DVI uses a sophisticated pattern of gradual intensity changes, reducing harsh flashes and improving visibility for both first responders and civilians. This smarter, softer warning light cuts through darkness without overwhelming the scene, helping crews maintain focus and awareness.
Vehicle-to-Vehicle Sync (V2V)
When multiple vehicles and agencies arrive on scene, uncoordinated warning lights can create confusion and chaos. V2V Sync wirelessly links light patterns across fleets and agencies, creating a unified, rhythmic flash sequence that maximizes warning effectiveness and minimizes visual clutter. A synchronized scene improves safety for all.
Innovations That Make a Difference
Built on decades of experience and a deep commitment to first responder safety, DVI and V2V Sync deliver smarter, safer solutions for nighttime operations.
Enhanced Nighttime Visibility
DVI’s gradual intensity transitions reduce flash blindness, making it easier for crews to maintain situational awareness in low-light environments.
Fleet-Wide and Cross-Agency Coordination
V2V Sync ensures that warning lights across multiple vehicles, even from different agencies, flash in unison, creating a clear, unified visual signal that improves scene safety.
Reduced Driver Distraction
Softer, intelligently managed lighting patterns decrease the risk of confusion or distraction for passing motorists, lowering the chance of secondary accidents.
Easy Integration
DVI and V2V technologies are designed to seamlessly integrate with Whelen’s industry-leading lighting systems, enhancing safety without adding operational complexity.
Purpose-Built for First Responders
Every feature is engineered to meet the real-world needs of first responders, helping them operate more safely, confidently, and effectively, especially during critical nighttime incidents.
Resources
A Michigan state trooper was struck and killed during a nighttime traffic stop while his cruiser’s flashing LED lights were active. The intense strobe lighting created glare that may have reduced visibility for other drivers.
A Maine trooper’s cruiser was rear-ended while stopped with flashing lights. The brightness likely masked the stationary vehicle’s outline, creating a hazard.
An impaired driver, blinded by bright LED strobing from a tow truck, struck and killed the tow operator.
Research by the Emergency Responder Safety Institute found that high-intensity flashing lights cause discomfort glare and make it harder for drivers to see responders on foot.
Drivers rated blue and white LEDs as most glaring, while red and amber were more effective and less blinding.
Combining high-intensity lights with retroreflective markings reduced how well drivers could see responders due to light scatter.
Multiple responders were struck during incidents where LED flashing lights were active-possibly making scenes harder to interpret.
A broader study confirmed that over-bright LEDs reduce visibility of both responders and victims, calling for tighter intensity caps.
Nighttime emergencies demand smarter solutions. With Dynamic Variable Intensity and Vehicle-to-Vehicle Sync, we help you create safer, more controlled scenes when visibility is at its lowest. As the industry leader in emergency warning technology, you can trust us to help your team stay focused and protected - no matter the hour.
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