One system, grounded in what's proven. A pattern language for roads and streets, built on Vision Zero and Dutch Sustainable Safety evidence, layered on NACTO's foundation.Commonway System
Why this guide is different Every prescriptive claim in this guidebook traces to a cited source, and every source carries an evidence tier, so you can see how strong the backing is before you decide whether to trust it. Learn how evidence tiers work.
Guide
Start here. How the system is put together, how patterns are classified, and how to read one.
Patterns
Every Street Typology in the system, organized from Local to Freeway.
Reference
The technical layer beneath each pattern: dimensions, criteria, specifications.
Blog
Process notes and research as the guidebook grows.
About
What this is, who maintains it, how decisions get made.
What's New
See what's changed recently, and what's coming next.