Rotterdam is using rain data to asjust traffic lights. Bicycles are waiting less at intersections. They also make the amber light longer to give you time to break for farther away and avoid a fall.
How does the hardware work? It seems like there isn't any radio hardware other than the ESP, so that can natively receive the ITS-G5 messages? Why not just use an ESP board with native ethernet then?
Found out about this today, up until now 802.11p hardware is very expensive, and so you cannot easily do anything with V2x messages like CAM or SPAT, but the fact this was done with sub £20 hardware is really interesting.
https://cartes.app. Based on OSM of course, but OSM is just a geographical database, with lots of incomplete UIs built on top by the community. Cartes is one of them, we're trying to make it complete and modern :)
The site is definitely lacking. It's half in German, half in English.
The concept is that there is this protocol called ITS-G5, which is a European profile of 802.11p. Vehicles and traffic infrastructure can transmit telemetry on 5 GHz. Other vehicles and traffic infrastructure can use it for situational awareness.
This website collects that data using local receivers and aggregates it onto a map, similar to what website like ADSB-Exchange do with ADS-B.
What is concerning is that vehicles appear to broadcast a MAC address. Does this mean that ITS-G5, 802.11p, and C-ITS could be used for persistent tracking?
Happy to see this popping up here, I watched the Linux Tage talk last week. The demo just kept getting better and better, to a point where the audience just interruptively cheers and claps away. I know nothing about the contents, but this warmed my heart. True hacker project!
Will be interesting to see how it fares when it does come to the US. It seems like there are some cars that already have the tech installed. But the US is allegedly more interested in the cellular version, which I am guessing is not as easy to pick up with a simple receiver?
My gut feeling is that this seems like one of those things likely to face a lot of backlash when it becomes widely known.
You still wouldn't have nearly as many dollars if you subtracted the times those people were correct in that assumption. Personally I assumed the site would be global. It doesn't have any info though, so I rely on finding out somewhere else I guess.
It seems pretty weird to use all English words in the domain for a service that offers no English translations and operates in no English speaking countries.
OpenStreetMaps works in the US and much of the rest of the world.
It's entirely reasonable to expect that a project with an extremely similar name would also work in most of the world, which just happens to include the USA.
The night bus service only runs the nights "before" Saturday and Sunday[1]. It's a small university city with 300k population (600k greater metropolitan area).
I recently learned that with smart traffic lights cyclists can change traffic lights -https://nltimes.nl/2026/04/28/new-app-turns-traffic-lights-g...
Rotterdam is using rain data to asjust traffic lights. Bicycles are waiting less at intersections. They also make the amber light longer to give you time to break for farther away and avoid a fall.
https://popupcity.net/insights/rotterdam-traffic-light-prior...
Codeberg link https://codeberg.org/opentrafficmap
How does the hardware work? It seems like there isn't any radio hardware other than the ESP, so that can natively receive the ITS-G5 messages? Why not just use an ESP board with native ethernet then?
They are doing it with the standard WIFI receiver. Currently they are sending the Wireshark dumps to a backend for processing.
According to their presentation they are working on a rust firmware to do everything on the board.
Found out about this today, up until now 802.11p hardware is very expensive, and so you cannot easily do anything with V2x messages like CAM or SPAT, but the fact this was done with sub £20 hardware is really interesting.
Fully agree. That's the most interesting thing about this.
We need global open congestion data. At least on the european scale.
It's important so that alternatives to Google Maps and Waze (Google) can emerge.
To create congestion data, one needs to own an OS with location tracking, or be an international mobile network. Won't happen.
[disclaimer : I work on an open source alternative to big tech's maps]
What is the OS alternative? OSM?
https://cartes.app. Based on OSM of course, but OSM is just a geographical database, with lots of incomplete UIs built on top by the community. Cartes is one of them, we're trying to make it complete and modern :)
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I haven't seen a theme on OSM data look this modern and fresh before. Beautiful color palette and iconography!
Can you try this one ? Though not as flashy, it's a step away from most OSM styles.
https://cartes.app/#13.13/47.06727/15.44801
It looks like Mapbox Standard [1]. While a free tier is available, most sites are going to need a paid plan.
[1] https://docs.mapbox.com/map-styles/standard/guides/
Agreed - it is very similar to Google Maps.
It's a Mapbox theme
Huge performance issues for me trying to use it on Chrome. But I like the idea.
I don't get this at all. Is this a live view of the traffic lights, buses, and more? How do they get the data?
Cool, but it there's no links for more info, and it doesn't seem to work in the USA at all.
The site is definitely lacking. It's half in German, half in English.
The concept is that there is this protocol called ITS-G5, which is a European profile of 802.11p. Vehicles and traffic infrastructure can transmit telemetry on 5 GHz. Other vehicles and traffic infrastructure can use it for situational awareness.
This website collects that data using local receivers and aggregates it onto a map, similar to what website like ADSB-Exchange do with ADS-B.
What is concerning is that vehicles appear to broadcast a MAC address. Does this mean that ITS-G5, 802.11p, and C-ITS could be used for persistent tracking?
> What is concerning is that vehicles appear to broadcast a MAC address.
Somewhat related: 'Your car’s tire sensors could be used to track you': https://networks.imdea.org/your-cars-tire-sensors-could-be-u...
Reading the translation of the talk, public transport vehicles have a persistent MAC but for private cars the MAC address changes every 15 minutes.
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What about the traffic lights on the map do they also have transmitters?
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This should be a top level comment as it has a ton of useful info and can be voted to the top.
Did they re invent APRS?
The project was shared as part of a talk at Graz Linux Tage. You can find it here, unfortunately it is only available in German
https://media.ccc.de/v/glt26-688-c-its-mit-einem-esp32-ampel...
Happy to see this popping up here, I watched the Linux Tage talk last week. The demo just kept getting better and better, to a point where the audience just interruptively cheers and claps away. I know nothing about the contents, but this warmed my heart. True hacker project!
Is there a link to the hardware they mention in the description?
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Pastebin here containing AI-generated English translation, LGTM: https://pastebin.com/fK5Atwzg
It's based on Car2X/Vehicle2X data that's sent unencrypted and can be received with chips you can order from China.
Will be interesting to see how it fares when it does come to the US. It seems like there are some cars that already have the tech installed. But the US is allegedly more interested in the cellular version, which I am guessing is not as easy to pick up with a simple receiver?
My gut feeling is that this seems like one of those things likely to face a lot of backlash when it becomes widely known.
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If I had a dollar for every time I've seen an American on the Internet assume that anything published in the English language must be US-centric...
You still wouldn't have nearly as many dollars if you subtracted the times those people were correct in that assumption. Personally I assumed the site would be global. It doesn't have any info though, so I rely on finding out somewhere else I guess.
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It seems pretty weird to use all English words in the domain for a service that offers no English translations and operates in no English speaking countries.
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Is expecting something to work in the US the same as expecting it to be US-centric?
Conversely, if I had a penny for every time someone complained about Americans... ;-)
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I did scroll across to the UK and was disappointed that there's none for here.
But I'll probably add my own receiver soon!
This is an American site to be fair. Mapbox is also an American company.
It does have an English name, so why the surprise?
OpenStreetMaps works in the US and much of the rest of the world.
It's entirely reasonable to expect that a project with an extremely similar name would also work in most of the world, which just happens to include the USA.
I mean I don’t anyone thought this was in the US since the UI is not in English. Maybe it’s more of, this neat, wish we had it here?
It will be nice if we everybody could just add own receivers, then it will be quickly cover more cities. But still nice project.
Ahh, it send automatically to website! "mqtts://cits1.opentrafficmap.org"
I wonder if this could be used to track location of the vehicle
Isn't that the point of the project? I'm seeing a bunch of tracked vehicles, although they all seem parked at the moment.
Does Graz not have night bus service?
The night bus service only runs the nights "before" Saturday and Sunday[1]. It's a small university city with 300k population (600k greater metropolitan area).
[1] https://www.verbundlinie.at/en/customer-service/arriving-in-...
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>WebSocket getrennt
Hug of death? Nothing loads.
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