How does Canberra’s planned design affect its road network?

Canberra’s road network is a direct reflection of its status as a planned city, heavily influenced by the 1912 design of Walter Burley Griffin. Griffin’s geometric plan utilized major roads to create lines of sight between prominent features, such as the parliamentary triangle, the municipal centre, and the commercial district.123

The modern road infrastructure continues to facilitate the city’s unique layout, which separates urban districts with large open spaces and hills. Key features of this network include:2

• Hierarchical Structure: High-speed expressways are designed to skirt the urban districts, while arterial roads manage traffic flow between suburbs.4
• Traffic Management: This design keeps residential streets relatively free of through traffic, prioritizing local access within neighborhoods.4
• Connectivity: The system is built to provide fast travel between the city’s distinct urban districts, which are spread out over a north-south axis of approximately 20 miles (30 km).42

Because of this planning, travel within Canberra is almost entirely dependent on private cars, as the road-based network serves as the primary infrastructure for personal transit.4