---
title: "Cul-de-sac"
url: "https://commonwaysystem.org/patterns/local-streets/cul-de-sac/"
id: "LOC-CDS-03"
description: "A dead-end Local Typology, Situational status, that peaks at Suburban density and thins out toward Urban and Core."
updated: "2026-09-26"
---

# Cul-de-sac

`LOC-CDS-03`

Situational / Discouraged Local

Cul-de-sac

A dead-end Local street with no through connection for any mode.

## Related Media

The items below come from outside the Commonway System, external videos, podcasts, and articles related to this page's topic, not part of the guidebook itself.

Aligned

### [The Reason Our Streets Switched to Cul-De-Sacs](https://www.youtube.com/watch?v=d9vDcfH03gs)

City Beautiful

Traces the postwar shift from connected grid networks to tree-shaped cul-de-sac subdivisions, then covers the same shared-use-path connector strategy CS's Network Reconnection retrofit recommends for stitching disconnected cul-de-sacs back into the surrounding network.

Typical at: Suburban

Compact is an edge case. Undeveloped, Rural, Urban, and Core are unlikely pairings.

Caution

Cul-de-sac carries Situational status. The connectivity and walkability expectations that define Urban and Core density are close to incompatible with a dead-end street pattern, so this Typology's realistic range is narrow, peaking at Suburban.[1]

## Speed and modal hierarchy

Design speed & speed limit

\[SPEED LIMIT 20\]

Follows the Local default: 20 mph hard maximum, no exceptions.

See [Design Speed & Speed Limits](https://commonwaysystem.org/guide/design-speed.md).

Modal hierarchy

Pedestrian > Bicycle > Vehicle > Freight

The Local base order minus Transit, since a dead-end street rarely carries a transit route.

## Design notes

A cul-de-sac trades network connectivity for a quiet, low-through-traffic environment. That trade only holds up at lower densities, where a disconnected street grid does not yet conflict with pedestrian and bicycle route continuity.

## Related patterns

[Grid](https://commonwaysystem.org/patterns/network/grid.md) (NET-GRD-01) (the connected Network topology this pattern structurally departs from, the basis of this page's cited connectivity/safety research), [Default (Standard Local Street)](https://commonwaysystem.org/patterns/local-streets/default.md) (LOC-DEF-01) (the base order this pattern drops Transit from)

## References

1.  Evidence-based [Marshall, W.E. and Garrick, N.W. (2011), "Street network types and road safety: A study of 24 California cities," _Urban Design International_ 16(2).](https://link.springer.com/article/10.1057/udi.2009.31)