Skip to Content
Streetsblog USA home
Streetsblog USA home
Log In
Bicycling

“Build It for Isabella”: Putting a Face on Why People Hesitate to Bike

build for isabella

pfb logo 100x22

Michael Andersen blogs for The Green Lane Project, a PeopleForBikes program that helps U.S. cities build better bike lanes to create low-stress streets.

Eight years ago, Portland Bicycle Coordinator Roger Geller wrote one of the most influential pieces of modern American bike-planning theory when he divided the potential transportation bikers in his city into four distinct groups:

It was an antidote to one of the most common and dubious ways people think about about bicycling: by dividing the world into "cyclists" and "non-cyclists." Because of course that's not how things really work.  People are constantly choosing whether to use a bicycle for a trip; the fact that most Americans choose not to isn't so much about their fundamental nature but about their culture, their resources, and their streets.

Geller was just spitballing with the percentages displayed above, but they were more or less validated by subsequent academic research. And though this framework didn't capture everything -- dangerous traffic is far from the only barrier to bicycling -- it was a new, deeply useful way of thinking and talking about the ways infrastructure affects our choices.

Here at Green Lane Project HQ, Geller's concept has been a major force behind our work helping cities build protected bike lanes.

But like Bob Edmiston of Seattle Neighborhood Greenways, who has created a useful riff on the concept with a character called Wendy ("the willing but wary cyclist"), we think these phrases are sort of a mouthful for people outside the world of bike pros. And we also think they don't fully capture how much is at stake on our city streets.

So we've been looking for a new way to capture the concept.

This summer, we found it -- in a conversation with Geller.

Every new bike project should strive to be usable by a 12-year-old

In the eight years since Geller's groundbreaking paper, his own infant daughter has grown up. And it was her he had in mind when he suggested, at a NACTO gathering in Chicago in June, a provocative idea: What if every new bicycle facility were built with the intent of being useful to a young girl?

If it were, wouldn't it be good enough for the rest of us, too?

That's why, at the Pro Walk Pro Bike conference this week, we're launching a new concept to help guide our work.

Build it for Isabella.

Isabella (who, just to be clear, is just a character, not Geller's actual daughter) is 12. She likes cartwheels, Instagram photos with her best friend, and ice cream cones. Sometimes she even likes school. But without someone to drive her around, she can't enjoy those things, because of the way her neighborhood's busier streets are built.

The ultimate goal of the Green Lane Project -- and, we'd argue, of all modern bicycle infrastructure -- is to let Isabella go where she wants.

Not every bike project will be able to serve Isabella. Some streets are just too narrow. Some budgets are just too thin.

But if any new bike project isn't good enough for Isabella, we would argue that it should have a pretty clear reason why not.

As Green Lane Project Director Martha Roskowski wrote in January, it's time to stop building black diamond bike lanes. Painted stripes and shared lanes simply don't serve most people. They certainly don't serve Isabella. If we want bicycle infrastructure to stop being seen as a handout to an interest group and start being a benefit to the public at large, we need to focus on making everything we build serve the public at large.

We need to build it for Isabella. If we do, we'll all love the cities we create.

You can follow The Green Lane Project on Twitter or Facebook or sign up for its weekly news digest about protected bike lanes.

Stay in touch

Sign up for our free newsletter

More from Streetsblog USA

Kansas City is Again Expanding Its Once-Mocked Streetcar

The Midwestern city is showing the country that investing in transit really can work wonders. 

February 25, 2026

Wednesday’s Headlines Will See You in Court

The lawsuits are already starting over the Trump administration's decision to stop regulating greenhouse gas emissions.

February 25, 2026

Tuesday’s Headlines Went the Wrong Way

Multi-lane one-way streets: bad. Single-lane two-way streets: good.

February 24, 2026

What It Would Take to Map Every Sidewalk In Your State

States and tech companies keep detailed records of virtually every driving lane in America — but not every sidewalk. Until now.

February 24, 2026

New Calif. Legislation, Backed by Bike Safety Groups, Proposed to Regulate E-Motos/E-Bikes

Electric bicycles are transforming how Californians get around, but the rapid rise of high-powered electric devices has created confusion that puts people at risk,” said Marc T. Vukcevich, Director of State Policy for Streets For All.

February 23, 2026

The Wonders of Biking in Taiwan

One of San Francisco's most notable urbanists explores Taipei's night markets and bike infrastructure. He wonders: can San Francisco adopt their biking culture?

February 23, 2026
See all posts