---
title: "Interchange (34)"
created: 2026-07-01
updated: 2026-07-01
type: concept
status: compiled
namespace: pattern-language
pattern_number: 34
pattern_name: "Interchange"
source_repository: https://github.com/zenodotus280/apl-md
source_url: https://github.com/zenodotus280/apl-md/blob/master/Patterns/Interchange%20%2834%29.md
license_note: Non-commercial reuse with attribution; see namespace README and source LICENSE.md.
related_patterns:
  - "Web of Public Transport (16)"
  - "Local Transport Areas (11)"
  - "Scattered Work (9)"
  - "Housing Hill (39)"
  - "Old People Everywhere (40)"
  - "Work Community (41)"
  - "Activity Nodes (30)"
  - "Arcades (119)"
  - "Bus Stop (92)"
  - "Mini-Buses (20)"
---

# Interchange (34)

> Source pattern from the abridged `apl-md` corpus. Use as a design reference and constraint seed; do not treat as commercial-clean training data.

### Problem
>Interchanges play a central role in public transportation. Unless the interchanges are working properly, the public transportation system will not be able to sustain itself.

### Solution
>At every interchange in the web of transportation follow these principles:

>1. Surround the interchange with workplaces and housing types which specially need public transportation.
>2. Keep the interior of the interchange continuous with the exterior pedestrian network, and maintain this continuity by building in small shops and kiosks and by keeping parking to one side.
>3. Keep the transfer distance between different modes of transport down to 300 feet wherever possible, with an absolute maximum of 600 feet.

### Related Patterns
... this pattern defines the points which generate the [[Web of Public Transport (16)]]. It also helps to complete [[Local Transport Areas (11)]] by guaranteeing the possibility of interchanges at the center of each transport area, where people can change from their bikes, or local mini-buses, to the long distance transit lines that connect different transport areas to one another.

Recognize that the creation of workplaces around every interchange contributes to the development of [[Scattered Work (9)]]. Place [[Housing Hill (39)]], [[Old People Everywhere (40)]], and [[Work Community (41)]] round the interchange; treat the outside of the interchange as an [[Activity Nodes (30)]]; treat the transfers as [[Arcades (119)]] where necessary to keep them under cover; give every interchange a [[Bus Stop (92)]] on the [[Mini-Buses (20)]] network ...

---

> [!cite]- Alexander, Christopher. _A Pattern Language: Towns, Buildings, Construction_. Oxford University Press, 1977, p. 183.
> #APL/confidence/low
>
> #APL/Town-Patterns/Local-Centers