Skip to Content
Streetsblog USA home
Streetsblog USA home
Log In
Bicycle Safety

Seattle May Try to Replicate Barcelona’s ‘Superblocks’

The intersection of a Superille, with excess street space repurposed for play. Photo: BCN Ecologia

A Seattle council member is proposing that a six-block area of the city's Capitol Hill neighborhood be transformed into a Barcelona-style "Superille" or "Superblock."

These clusters of blocks — in which car traffic is mostly curtailed — have become hugely popular in the Spanish city, transforming residential districts by creating walkable, child-friendly neighborhoods with welcoming public spaces.

Council Member Teresa Mosqueda thinks that superblocks would work well in her district, so she is urging that Seattle pilot the model in a six-block area of Capitol Hill between between Pine and Union between 12th and Broadway. Vehicle traffic would be routed around the area, sparing residents living on the interior blocks the noise, pollution and danger of interaction with traffic.

Mosqueda said she would take up the idea after the election in November, when she hopes it will receive the support it needs in the council, Margo Vansynghel at Capitol Hill Blog reported.

superblock-2-468x251

Of course, Seattle, a national leader on street design, is already experimenting with a similar idea. The city calls its experiment "home zones." It is offering $350,000 in grants for neighborhoods that want to try traffic calming within "a grid of arterial streets."

By all accounts, the Superilles experiment in Barcelona has been a huge success, as David Roberts at Vox has detailed. On some of the city's earliest Superblocks, bike trips rose by 30 percent and walking jumped 10 percent. The blocks make urban life quieter and more peaceful and sociable by creating a space for gathering and play, as the photo above shows.

Barcelona eventually hopes to expand them to cover the entire city.

Stay in touch

Sign up for our free newsletter

More from Streetsblog USA

The Most Expensive Bikeshare in the U.S. Is…

The price of a yearly Citi Bike membership has grown by 77 percent in inflation-adjusted dollars since the bike-share program launched 2013, the Independent Budget Office said.

November 19, 2025

Wednesday’s Headlines Have Their Head in the Sand

The Trump administration doesn't want to fund transit, know how many people ride it, or acknowledge the impacts of getting rid of it.

November 19, 2025

Report: Traffic Injuries Increase Near Amazon Last-Mile Warehouses

Injuries are increasing near last-mile warehouses and advocates want to change the model for more accountability.

November 18, 2025

Breaking: Trump Admin Seeks To Decimate Federal Transit Funding

"When you're talking about taking away money from transit, your proposal is flawed from the get-go," said one expert.

November 18, 2025

Tuesday’s Headlines Lost the Battle but Won the War

A Politico long read details how bureaucracy slowed down but couldn't stop the conversion to EVs.

November 18, 2025
See all posts