---
title: "Radial"
url: "https://commonwaysystem.org/patterns/network/radial/"
id: "NET-RAD-03"
description: "A network topology in which routes converge toward and radiate outward from a central point, frequently supplemented by circumferential (ring) routes connecting the radial spokes at varying distances from the center."
updated: "2026-09-26"
---

# Radial

`NET-RAD-03`

Situational / Discouraged Network

Radial

A network topology in which routes converge toward and radiate outward from a central point, frequently supplemented by circumferential (ring) routes connecting the radial spokes at varying distances from the center.

## Why this pattern exists

Radial networks arose historically and organically around a defined city center, and remain genuinely efficient for travel oriented toward that center; but the same convergence that makes downtown travel efficient also concentrates traffic at the center and underserves travel between non-downtown points. This pattern documents the topology and its common hybrid forms.[1]

## Key considerations

-   Distinguish pure Radial from Radial-Circumferential (radial routes connected by one or more ring roads) and Radial-Grid (a radial system superimposed on an underlying grid); each has different tradeoffs
-   Route convergence near the center requires deliberate capacity and intersection design, since multiple high-volume routes meeting at or near one point is a well-documented source of congestion
-   As travel patterns shift away from single-downtown-focused trips toward more distributed origin-destination pairs, a purely radial system increasingly underserves the majority of trips

## Related patterns

[Grid](https://commonwaysystem.org/patterns/network/grid.md) (NET-GRD-01), [Dendritic/Hierarchical](https://commonwaysystem.org/patterns/network/dendritic-hierarchical.md) (NET-DEN-02), [Organic/Irregular](https://commonwaysystem.org/patterns/network/organic-irregular.md) (NET-ORG-04) (contrasting Network topologies)

## References

1.  Precedent-based Levinson, Herbert S., and Kenneth R. Roberts. "System Configurations in Urban Transportation Planning." _Highway Research Record_, no. 64 (1965): pp. 71-83. Available at: [https://onlinepubs.trb.org/Onlinepubs/hrr/1965/64/64-002.pdf](https://onlinepubs.trb.org/Onlinepubs/hrr/1965/64/64-002.pdf)