Late 20th Century (1975–2000)

Groningen Traffic Circulation Plan

1977 · Netherlands · Western & Central Europe · Transit-oriented urbanism and corridor planning · Planned by City of Groningen
The 1977 Groningen Verkeerscirculatieplan: the inner city split into noord, west, oost and zuid sectors, with car movement forced back out onto the Diepenring.
The 1977 Groningen Verkeerscirculatieplan: the inner city split into noord, west, oost and zuid sectors, with car movement forced back out onto the Diepenring. · © Gemeente Groningen / Rijksdienst voor het Cultureel Erfgoed — used with credit · Gemeente Groningen, via Rijksdienst voor het Cultureel Erfgoed (Post 65)

Core idea

Modal filtering; quadrant system

Why it matters

Pioneer of low-traffic city cores

Description

Groningen's Traffic Circulation Plan of 1977 divided the compact medieval city centre into four quadrants between which private cars could not pass directly, forcing motor traffic onto a ring road while cyclists and buses retained full cross-centre movement. Introduced by a young left-wing city council and implemented almost overnight, the scheme was a piece of regulatory rather than physical planning, achieving a radical reordering of the street network with paint, signage and enforcement rather than major construction.

Significance

The plan is a pioneering example of modal filtering at the scale of an entire city core, and it helped make Groningen one of the most cycled cities in the world. It has become a canonical reference for the low-traffic neighbourhood and circulation-plan movements of the twenty-first century, cited by cities from Ghent to Birmingham as proof that traffic can be restructured quickly and cheaply when political will exists.

What shaped it

Plans it influenced

Sources

Open it on the interactive timeline →
hub.toekom.st — History of Urbanism · an interactive timeline of 850 planned cities across 6,000 years.