Connecting to the camera…
Instruments
2 playing togetherTap any pad — stack as many as you like 16 voices
kottke.org
“A musical instrument.”
Jason Kottke featured The 101 Plays Itself as five lanes of LA highway turned into an instrument, where every car on the live Caltrans camera becomes a note.
News hit
The freeway became the segment.
NBC4 Los Angeles featured The 101 Plays Itself on The News Zone, its new unscripted, conversation-driven news show built around a live newsroom format. The segment framed the project exactly where it belongs: a local LA freeway, a public Caltrans camera, and real traffic composing the score in real time.
The Drive
“Strangely beautiful.”
The Drive covered the project as a strangely beautiful bit of infrastructure music: real highway traffic, a public camera, and a browser turning five lanes into a musical staff.
The New York Times — The Good List
“Turns a highway traffic cam into a musical synth.”
Melissa Kirsch's "The Good List" newsletter from The New York Times featured The 101 Plays Itself as part of a collection of ideas and cultural artifacts for adding joy. The article highlighted the project's ability to turn real-time traffic patterns into live music.
- Notes played
- 0
- Passing at
- —mph
- Per minute
- —
- Trucks
- 0
- Lanes
- Listening for
- 0:00
What is actually happening
This page is playing a public Caltrans traffic camera live. Nothing is pre-recorded — the timestamp burned into the top of the picture is the real one, and if you come back at three in the morning you will hear an almost empty freeway.
Ten sampling patches are laid onto the road surface, two in each of the five lanes. They are not rectangles: each one is a slice of its own lane, leaning and narrowing with distance exactly as the lane does. Your browser reads those patches fifteen times a second and watches for the road to stop looking like the road. That is a car, and that is a note.
Underneath, the timing comes from ten small sampling patches on the tarmac, two per lane, each a slice of its own lane rather than a rectangle. A vehicle trips one and then the other, and the gap between them gives its speed — a real speed trap, 13.4 metres long. How long it covers a patch gives its length, which is how the page tells a truck from a car and hands it a different voice.
Where the cameras are
Every camera this page can play. The lit pin is the one you are listening to; tap another to switch.
Video: Caltrans CAM 618, a public traffic camera, used under their conditions of use. Detection and synthesis run entirely in this browser — no server, no samples, no recordings. Lane geometry was solved offline from an earlier recording of this same camera.
If the camera is down, or you would rather hear a finished take: three recorded minutes of the same freeway.
Built by Jay Judah jayjudah.com · Los Angeles, 2026