Does your local street ever feel less like a residential lane and more like a busy thoroughfare (maybe on soccer night or during school pickup)? Are there relatively quiet residential streets that get used as a shortcut to shave thirty seconds off errands for hundreds of people a day? This phenomenon, called “cut-through traffic” or sometimes called “rat running,” degrades the peace and quiet of our local streets. It makes the places we and our neighbours live noisy, polluted, and dangerous for our kids.
What if we could stop it with something as simple as a couple of planters?
This is the elegant power of the modal filter. A modal filter is a point on a street where we deliberately block through-traffic for cars, while keeping it wide open for people walking, rolling, and cycling. It’s not about closing a street; it’s about setting up a filter for who can use it as a shortcut.
Picture a line of sturdy bollards, a series of large, beautiful planters, or even a set of curb extensions that leave a gap just wide enough for a cargo bike or a trailer to pass through. The local resident can still drive to their home, usually from either side, and in most cases emergency services can still get through or around when necessary. The main change is that the endless stream of drive-through interlopers is no longer able to use that particular route to get through, and they have to take a little extra time on main roads designed for higher speeds and traffic throughput.
When cities implement networks of modal filters (whether retrofitted or when the neighbourhood is first built, they create what are called “low-traffic neighbourhoods.” The results are transformative:
- Safety Becomes the Default: Studies in places that have embraced this, like London, have shown traffic on filtered streets can fall by over 50%. With fewer cars moving at slower speeds, the street is no longer anywhere near as much of a hazard. It becomes a place where kids can learn to ride a bike and neighbours can stop to chat in the street without fear.
- The Noise Fades: Take a moment and just listen outside. If you live anywhere near a highway or arterial road, you can usually pick up a constant background hum is motor traffic (you generally block this out, but it’s there). By cutting the volume of cars, we cut the volume of noise. The peace and quiet we often seek by leaving the city on vacation can become an everyday reality.
- Cleaner Air: Fewer cars idling, braking, and accelerating nearby directly translates to better local air quality.
The most common objection when it comes to modal filters is that this will just create gridlock on the surrounding main roads. But a funny thing happens when you make driving less convenient (compared to other modes): some of the traffic simply “evaporates.” People begin to rethink their trips. Maybe they combine two errands into one, choose to walk a little further to the corner store, or realize the bike is almost certainly faster for a short local trip.
Modal filters are one of the most effective tools we have to reclaim our residential streets from the dominance of the car. They turn a busy street (on that sometimes even tries to rely on speed bumps or other traffic calming measures) back into a safe community space.
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