Skip to content
Sponsored

Thanks to our advertising sponsor -

What 20 Percent of Trips by Bike Looks Like in Aarhus, Denmark

It can be hard to imagine what San Francisco's streets would look like if the city reaches its official goal of having 20 percent of trips by bike by 2020. As SF begins rolling out protected bike lanes like the one on JFK Drive, there's some skepticism out there as to whether the dream of bicycling as a widely accessible, mainstream mode of transport could materialize here.

It can be hard to imagine what San Francisco’s streets would look like if the city reaches its official goal of having 20 percent of trips by bike by 2020. As SF begins rolling out protected bike lanes like the one on JFK Drive, there’s some skepticism out there as to whether the dream of bicycling as a widely accessible, mainstream mode of transport could materialize here.

As it happens, I spent the spring of 2010 living in a city that has a 20 percent bike mode split. Aarhus, Denmark’s second-largest city, with formidable hills and about 315,000 residents (1.2 million in the greater area), has been rolling out protected bike lanes over the past few decades and continues to promote bicycling through a campaign called “8,000 Reasons to Cycle.”

Like San Francisco, Aarhus is improving its bike infrastructure to catch up with the most successful cycling cities, like nearby Copenhagen, which has a citywide bicycling rate of 37 percent (and is shooting for 50 percent by 2015). You can check out Aarhus’s three-year Cycling Action Plan here [PDF].

The Aarhus campaign video provides a nice glimpse of what the “20 percent” vision would look like: groups of cyclists, young and old, using dignified, dedicated bicycle infrastructure everywhere you go. It also lists a few of the “8,000 reasons to cycle” (in case you’re wondering, “8000” is the Aarhus postal code). Here are the translations from Danish:

  • Reason #674: Big smiles
  • Reason #762: Exercise and fresh air
  • Reason #2,548: Faster through traffic
  • Reason #6,237: Quality time with the kids
  • Reason #94: CO2-neutral transport (well, that one’s in English)

All these reasons are great benefits of cycling, but what Aarhus, San Francisco, and many other cities around the world find time and time again is that the most important factor that gets people to bike more is safety — a convenient and seamless network of calm streets and protected cycling facilities.

San Francisco’s own progress is already highly visible during rush hour on Market Street, the busiest bicycling street west of the Mississippi, according to the SF Bike Coalition, where bicyclists make up as much as 75 percent of roadway traffic. That number only seems to have grown since the SFMTA has added green, post-separated bike lanes west of 8th Street and diverted car traffic off of Market.

Who knows — it could look something like Copenhagen on Bike to Work Day this Thursday.

Photo of Aaron Bialick
Aaron was the editor of Streetsblog San Francisco from January 2012 until October 2015. He joined Streetsblog in 2010 after studying rhetoric and political communication at SF State University and spending a semester in Denmark.

Streetsblog has migrated to a new comment system. New commenters can register directly in the comments section of any article. Returning commenters: your previous comments and display name have been preserved, but you'll need to reclaim your account by clicking "Forgot your password?" on the sign-in form, entering your email, and following the verification link to set a new password — this is required because passwords could not be carried over during the migration. For questions, contact tips@streetsblog.org.

More from Streetsblog San Francisco

Caltrans and MTC to Hold Greenwashing Panel for North Bay Freeway Widening

April 23, 2026

Judge Blocks Trump Admin’s Attempt to Demolish D.C. Bike Lane

April 22, 2026

Advocates Celebrate Milestone in Signature Gathering for Transit Funding Measures

April 22, 2026
See all posts