Bike Infrastructure

Cambridge, Massachusetts: When a City Makes Bike Lanes the Law

Cambridge, Massachusetts wrote protected bike lanes into law and defended it in court—twice. The result is one of the strongest legal commitments to safe cycling infrastructure in North America, showing what happens when a city doubles down on safer streets.

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When Fire Trucks Block Safer Streets

How oversized fire trucks and outdated rules quietly block safer street design—and what it would take for firefighters to become Vision Zero allies.

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New York City's Bike-Lane Drama: Lawsuits, Busways, and a Stalled Streets Plan

New York might be the original 'bike lane war' city. Over the last 15 years, it has gone from a handful of painted lanes to one of the largest protected networks in North America, but every big step has come with drama: lawsuits over flagship projects, apocalyptic congestion forecasts, a mayor who fell short of legal mandates, and now a car-free mayor-elect promising to complete what his predecessor left unfinished.

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Bikes vs. Bill 212: Ripping Out the Solution

Ontario tried to rip out Toronto's busiest bike lanes in the name of reducing gridlock. A 2025 court ruling found the removal would make people less safe without easing congestion—and struck it down as unconstitutional.

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San Francisco’s Bike Lane Battles: Valencia, JFK, and the Great Highway

How San Francisco’s battles over Valencia Street, JFK Promenade, and the Great Highway reveal the politics and data behind reallocating space from cars.

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Bike Theft by the Numbers: Which US Cities Are Worst and Why

Bike theft in the US is a multi-billion-dollar problem concentrated in a handful of states and cities; this data-driven guide explains where theft is worst, why it clusters there, and what actually reduces the risk for everyday riders.

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Half of Boston's Blocked-Bike-Lane Reports Come From Nine Corridors

Nearly 1,000 crowdsourced reports of cars in Boston bike lanes cluster onto a handful of corridors. An optimization over the data identifies nine merged corridors that account for 508 reports—53% of the total—yielding a map of where to build protection first.

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Calgary Put a Bike-Lane Network on Trial—and Measured Everything

Calgary’s 18-month cycle-track pilot measured ridership, safety, winter use, traffic, demographics, and business impacts before going permanent.

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Twelve Loading Zones Could Cover Half of Cambridge's Blocked-Bike-Lane Reports

355 crowdsourced reports of cars in Cambridge bike lanes collapse onto a handful of curbs. An exact optimization finds the 12 smallest loading-zone locations—each a 200-meter circle—that together cover 51% of every report, and proves no eleven can do it.

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The Infrastructure That Brings Women Back to Bikes

Women aren’t ‘less into cycling’—they’re less into getting hit by cars. Here’s the street design that reliably closes the gender gap in biking.

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Real barriers don't fold

A car can only block a bike lane it's able to enter—which means the same lanes get parked in and get people killed. Greater Boston's blocked-lane reports show why only real, physical separation fixes both.

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Reporting Cars in Bike Lanes: A History of Citizen Enforcement

How cyclists turned smartphones into an enforcement tool—from 311 and Bike Lane Uprising to Bike Bureau's open data and fast-growing Boston-area reporting network.

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The Right Hook: Why Protected Lanes Still Kill at Intersections

Protected bike lanes save lives mid-block, but many serious crashes still happen at intersections. Here’s why right hooks remain deadly—and how better design plus tools like Loud Bicycle horns can help.

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The Bike Lane That Was Supposed to Kill Saint-Denis Street

How Montreal's Saint-Denis REV changed cycling, winter travel, traffic, and local business—and what its data can really prove.

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Seville Built a Bike Network, Not a Collection of Bike Lanes

How Seville built a connected protected bike network fast, multiplied cycling, reduced risk per trip, and exposed the limits of lane mileage.

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The Fastest Way Around Boston: Bikes vs the T from Cleveland Circle

Using travel-time maps from Cleveland Circle, we compare cycling and the MBTA to see which is really faster for getting around Boston.

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What Blocks Bike Lanes

Explore the vehicles behind crowdsourced bike-lane obstruction reports. A photo-based breakdown with fleet counts and links to the original reports.

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When Bikes Honk Like Cars

What a podcast interview taught me about building a car-horn-loud bicycle horn, driver reflexes, and the gap in bike infrastructure.

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Why Women in the US Don't Bike as Much as Men

In Utrecht, women ride bikes as much as, or more than men. But in Chicago, men dominate the bike lanes. The difference isn’t culture or biology; it’s how the streets are built.

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Why Your Bike Lane Ends at Every Intersection (And How the Dutch Fixed This)

Why bike lanes vanish at intersections, how Dutch-style protected junctions solve it, and what North American cities can copy right now.

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