San Jose Is Training AI to Identify Homeless Camps

Images captured on cameras mounted on a municipal vehicle are being used to train a private technology companies’ AI algorithm to detect tents and signs of habitation in vehicles.

2 minute read

April 2, 2024, 11:00 AM PDT

By Mary Hammon @marykhammon


Homeless Camp

pisaphotography / Shutterstock

The Guardian recently reported that San Jose is conducting what experts believe to be a first-of-its kind experiment to train AI to recognize tents and cars with people living inside them. Since last December, city employees have been driving periodically through the city’s district 10, filming footage of streets and public spaces with a camera mounted on a municipal vehicle. That footage is then fed into computer vision software and used to train algorithms for a handful of technology companies’ algorithms to detect “unwanted objects.”

“Some of the capabilities the pilot project is pursuing — such as identifying potholes and cars parked in bus lanes — are already in place in other cities. But San Jose’s foray into automated surveillance of homelessness is the first of its kind in the country, according to city officials and national housing advocates,” writes Guardian reporter Todd Feathers.

The pilot won't likely impact just San Jose, Feathers reports: "San Jose’s position as a national leader on government procurement of technology means that its experiment with surveilling encampments could influence whether and how other cities adopt similar detection systems.” It could be of particular interest to the increasing number of local governments criminalizing activities that homeless people have no choice but to undertake, as well as Florida municipalities looking to enforce that state’s new ban on outdoor sleeping.

The Guardian article digs into the finer details of how the AI algorithms are being trained to distinguish between, for example, an RV that’s simply parked and one that’s being lived in, as well as privacy issues for people’s faces and license plate numbers that are captured. Though the pilot’s data use policy says the footage can’t be used for law enforcement purposes, police can request the footage. And, in light of San Jose’s recent crackdowns on homeless encampments but already overwhelmed shelters that leave the unhoused people nowhere to go, housing advocates are concerned the technology will be used to punish the city’s unhoused residents. A city employee told the Guardian that one response to the new technology’s findings might be to send outreach workers to a single tent before it can grow into an encampment; however, the San Jose housing department and non-profits providing aid to unhoused people told the Guardian they were not involved in the pilot.

Monday, March 25, 2024 in The Guardian

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 16, 2025 - Diana Ionescu

Blue and white Seattle Link light rail train exiting concrete Downtown Bellevue Tunnel in Bellevue, WA.

Why Should We Subsidize Public Transportation?

Many public transit agencies face financial stress due to rising costs, declining fare revenue, and declining subsidies. Transit advocates must provide a strong business case for increasing public transit funding.

April 7, 2025 - Todd Litman

Two people on bikes in red painted bike lane with bus in traffic lane next to them.

Understanding Road Diets

An explainer from Momentum highlights the advantages of reducing vehicle lanes in favor of more bike, transit, and pedestrian infrastructure.

3 hours ago - Momentum Magazine

Aerial view of large warehouses across from development of suburban single-family homes in Jurupa, California with desert mountains in background.

New California Law Regulates Warehouse Pollution

A new law tightens building and emissions regulations for large distribution warehouses to mitigate air pollution and traffic in surrounding communities.

4 hours ago - Black Voice News

Purple Phoenix light rail train connected to overhead wires at sunset.

Phoenix Announces Opening Date for Light Rail Extension

The South Central extension will connect South Phoenix to downtown and other major hubs starting on June 7.

5 hours ago - Arizona Republic