The majority of households in North America own at least one car and driving is a daily activity for most people. In fact, driving is so normal that it becomes a routine performed with minimal concentration. And that can lead to all sorts of dangerous actions behind the wheel, like texting, eating, daydreaming. But amid these well-known concerns lies a relatively overlooked phenomenon: velocity renormalization.
WHAT IS “VELOCITY RENORMALIZATION?”
Velocity renormalization, or velocitization, is when your brain adapts to a certain driving speed (like highway speeds) and misjudges other speeds. This makes slower traffic seem extremely slow or makes you feel like you’re crawling when you slow down. The perceptual shift that can affect speed judgment and lead to errors like unintentional speeding or over-braking after exiting a freeway. It’s an adaptation effect where your internal “normal” changes, affecting how you perceive your own speed and that of others, highlighting the need to regularly check your speedometer.
When drivers leave a highway and have to merge with slower traffic, their perception of normal speed is altered and they often unconsciously misjudge their own speed. This also works in reverse. Someone who was moving slower can perceive a faster speed limit as being higher than it actually is.
THE SCIENCE
George Mather, a Professor of Vision Science at the University of Lincoln, led a study into this subject, concentrating on the adaptation effect. The study looked into a person’s perceived norms of how fast something goes or should go after having experienced short periods of exposure to different speeds. After watching a slowed-down video of human movement, participants in the experiment were then shown normal speeds, which they perceived to be unnaturally fast. They required the natural-speed video to be slowed down for it to appear “normal”.
THE EFFECT ON DRIVERS
Velocity Renormalization is exactly what happens to a driver’s brain after they drive at a certain speed. In short, they will be prone to misjudging their velocity and, for example, approaching a highway exit ramp too fast. It can take time to mentally make the transition from faster to slower zones (or vice versa). Therefore, it’s important for drivers to double-check their speed when moving from one speed limit to another.
Because driving is so routine and natural for most people, it’s sometimes easy to forget that it’s a dangerous activity involving thousands of pounds of metal moving at high speeds. As Professor Mather’s research shows, drivers are also affected by a variety of effects that can alter their perception. All those factors add up and over 37,000 people die in car crashes in America every year—that’s over 100 a day.
Driving 35 mph, especially after you’ve been on the freeway, feels slow, while 35 mph on a bicycle feels like a bullet train. In a modern luxury car, even 70 mph can feel tedious. There are a few things going on here. Our eyes and our ears provide input for our perception of speed. On the freeway everything is far away, compared to city driving. The shoulders are wide, the road signs are set back, the closest trees might be 50 feet from the edge of the road, the other traffic nearly matches our speed. We don’t have any nearby markers to indicate how fast the world is zipping by. Compare that to when you’ve encountered a freeway work zone with concrete barriers at the edge of your lane. The lane width hasn’t gotten any narrower, but now you’re zooming past objects right next to you, and suddenly it feels too fast.
CAN YOU BE CRIMINALLY CHARGED FOR DRIVING TOO FAST?
Yes. Driving significantly over the limit (often 20-30 mph or more) or too fast for conditions (rain, fog, ice) can elevate a speeding ticket to criminal charges like Reckless Driving. Being convicted of this charge can lead to potential jail time, hefty fines, and license suspension.
Please contact my office if you, a friend or family member are charged with Reckless Driving or any other crime. Hiring an effective and competent defense attorney is the first and best step toward justice.
