VFR Lightboard

Calculate Vehicle Speed Accurately From Any Surveillance Camera

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The growing availability of video evidence has created significant opportunities for accident reconstructionists who want to measure distance and timing for the purpose of calculating vehicle speeds, especially in pre-impact conditions where no physical evidence is available on the scene.

However, video evidence from surveillance systems is not always what it appears to be. Timing is often inaccurate, frame rates are often misidentified and misleading, and the method of counting frames while assuming a consistent frame rate has led many investigators to produce inaccurate measurements. It is not uncommon to see comprehensive scientific presentations get entirely dismissed over a single critical element, like misrepresenting speed through a frame rate calculation.

The new Variable Frame Rate (VFR) Lightboard provides an easy workflow to accurately calculate vehicle speeds from any surveillance camera device within a reported margin of error.


Key Benefits


Verified speed & timing calculations


Accurate margin of error to the millisecond


Simple and consistent methodology


Easily create court-ready reports and charts


Validated technology with 2-year calibration certificate

iNPUT-ACE video evidence software and training

The VFR Lightboard provides a range of speeds that a vehicle was traveling to a minimum and maximum with a precisely defined margin of error. The iNPUT-ACE Overlay Tool provides an excellent method to produce a distance calculation from the same surveillance video, making iNPUT-ACE an end-to-end solution for calculating timing and distance for speed calculation.

iNPUT-ACE video evidence software and training
VFR Lightboard LED Pattern

How Does the VFR Lightboard Work?

Frame rates inside a video file are often incorrect, which is why relying on frame rates or other timing metadata to calculate speeds can produce inaccurate measurements.

In addition, driving a test vehicle through the scene to compare the test recording with the original footage is often an unreliable methodology due to the variability of frame timing in surveillance systems.

The VFR Lightboard provides simple, fast, and accurate methodology for calculating vehicle speeds from video to a defined margin of error.

In-Depth with the VFR Lightboard – Watch the Webinar!

VFR Lightboard Timing Report

Example Timing Report:

The image to the left is an example of the VFR Lightboard Image Timing Report. Click the image to view the full report with 400 different frame intervals.

VFR Light Board Physical Dimensions

  • 13.125” wide
  • 9.375” high
  • 1.3125” deep

More Images of the VFR Lightboard:

iNPUT-ACE Lightboard
iNPUT-ACE video evidence software and training
iNPUT-ACE video evidence software and training


Every single lightboard is calibrated by our team and validated, using two separate methodologies that provide the tolerances for device accuracy. We certify this calibration for two years and recommend recalibration every two years. The VFR Lightboard Basic license includes a full 1-year warranty with an optional extended warranty. The VFR Lightboard requires iNPUT-ACE and the VFR Calculator module.

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Lightboard Order Form - With Automations


At iNPUT-ACE, our mission is to empower investigators with intuitive tools, expert training, and comprehensive support to further video-centric investigations. We strive to ensure every investigator can extract actionable intelligence from video evidence without being slowed down by the technical challenges that are common in video files.