UPGRADE PARTY
v28.0 changeset — infrastructure log

Robot Alley

What if every sidewalk had a hallway underneath it — one built for delivery, mobility, and the city's utilities all at once?

The Core Idea

Imagine that underneath every sidewalk was a hallway that:

  • Delivery

    Allows automated delivery of goods directly to homes and businesses.

  • Mobility

    Provides freedom of mobility for people who don't drive.

This is a multi-level transportation and utility structure built under sidewalks, alleys, or streets. We call it Robot Alley.

Robot Alley concept illustration
Cross-Section

Three Levels, One Structure

L1
Sidewalk LevelAutonomous vehicles deliver goods and people at ground level, alongside pedestrians.
L2
Transport LevelOne-way underground lane maximizes throughput — vehicles run regardless of weather or surface traffic.
L3
Utility LevelCity water, electrical supply, backup power, and thermal loop lines all run in the same shared corridor.
Ripple Effects

What Door-to-Door Delivery Changes

Once automated delivery becomes routine, the effects reach well beyond convenience:

  • What's Sold

    Shelf space stops limiting what's available locally. Anyone can list goods online and ship them immediately through the City Transport system.

  • Delivery Cost

    Electric vehicles cut fuel and labor costs down to loading and order processing — with storage handled by easily retrieved containers and essentially unlimited capacity.

  • Repair Cost

    Central repair locations can receive and return goods far more easily than today's fragmented shipping.

  • Disposal

    Central disposal routes items to the best possible end-of-life outcome, instead of whatever's most convenient at the curb.

Shared Infrastructure

What Runs in the Utility Level

  • Main city water — highest quality, for drinking and household use.
  • Fire suppression / garden water — lower-quality water for non-potable needs.
  • Main electrical supply — the primary power grid connection.
  • Backup electrical supply — local generators, at higher cost, for resilience.
  • Thermal loop — circulating hot and cold fluid for heating and cooling, a district-scale concept already used worldwide.
The Last Few Feet

Delivery Endpoints

A delivery endpoint could be as small as a dumbwaiter-style lift straight into a kitchen or office — or as large as a direct feed into a room or warehouse. The City Transport System controls every part of that journey: routing, sequencing, and the handoff at the very end.

Related Ideas

Built for the Same Future