Ask the Experts: How Do Stop Lights "See" Your Car (To Turn Green)?

1 min. Read • Posted 07/31/2020 by David Sadeghi

Traffic and transportation enthusiast Rob Sanders, better known in the YouTube community as Road Guy Rob, has released a catalog of fun and informative videos answering such questions as "How do Interstate highways happen?", "Why are toll booths going away?" and "How do engineers make bridges earthquake safe?".

In his latest video as part of his Ask the Experts series, Rob caught up with Iteris' Brian Girardot and Caltrans' Mohammed Bendelhoum to learn more about the history and benefits of video detection vs. induction loop detection.

Watch here:

<iframe width="650" height="480" frameborder="0" allowfullscreen="allowfullscreen" src='https://www.youtube.com/embed/pTR3Cn5DnHY?autoplay=0&start=0&rel=0'></iframe>

About the Author:

David Sadeghi

David Sadeghi is senior manager, digital marketing at Iteris.

Connect with David on Twitter and LinkedIn.

About the Author

David Sadeghi is director, digital marketing at Iteris.

Connect with David Sadeghi on LinkedIn

Share This Post

Share

Post Topics

Related Posts

What’s Driving the DRAM Shortage – And What It Means for Transportation Technology
4 min. Read • Posted 07/23/2026 by Todd Kreter
Across industries, organizations are contending with longer lead times and limited supply for advanced electronic systems. These limited supplies include memory devices, power circuitry and hard disk drives. The major driver? The explosive growth of AI and AI data centers. See More >

How Agencies are Modernizing Small Intersections
3 min. Read • Posted 06/19/2026 by Caroline Cohen
When agencies think about traffic detection upgrades, attention often goes to large, complex intersections. But for many agencies, the bigger challenge is the smaller intersections with geometric constraints, aging infrastructure, and limited mounting options. See More >

New Industry Certifications for BlueTOAD Spectra CV
5 min. Read • Posted 04/03/2026 by Jeff Venables
Iteris BlueTOAD® Spectra™ CV has been certified by the National Electrical Manufacturers Association (NEMA) and the Federal Communications Commission (FCC). A third certification, by the OmniAir Consortium, is expected soon.See More >

Subscribe to Our Newsletter

Receive smart mobility news and analysis direct to your inbox.