Infrastructure

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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Barcelona’s Superblocks: When Traffic Lanes Became Public Squares

How Barcelona’s superblocks reclaim streets from cars, cut pollution and noise, and spark fierce debates about business, gentrification, and the right to the city.

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Bicycle Snow Plows and the Cities That Clear a Path

How cities and DIY tinkerers use bikes and small plows to keep winter bike lanes clear—and what it means when bicycles start doing car jobs.

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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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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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Floating Bus Stops: When a Protected Bike Lane Crosses the Bus Door

What floating bus-stop evidence says about bike safety, disability access, cyclist yielding, and England's pause on shared-use boarders.

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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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One-Way or Two-Way? How to Choose a Protected Bike Lane

One-way vs. two-way protected bike lanes: how intersections, access, width, signals, curb use, and maintenance should decide the design.

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Paris After the Car

Paris shows how a car-choked capital can quickly become quieter, cleaner, and more livable, and what other gridlocked cities can copy.

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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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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 Reason Our Streets Switched to Cul-De-Sacs

How federal housing policy, neighborhood-unit planning, and engineering manuals pushed North American streets from walkable grids to cul-de-sacs—and what that means for safety, traffic, and active travel.

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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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