[doublerabbit]

Within the UK, 4G sim cards and data are cheap. Android phone with tether capabilities, Raspberry Pi with solar and a webcam.

Or even better to save all that faff, root a phone, run the drivers plate OCR software using the phones camera, stick to a gantry and send results via text message. You wouldn't even need live updates, pull the latest data at midnight each day.

Text is cheap.

[arethuza]

I suspect the computing and communication parts of a project like this are by far the easiest bits.

Weatherproofing the camera and solar panels, getting permission to get them installed, actually installing them (working at heights over busy roads) and then maintaining them would be pretty expensive. You might also have to pay rent to whoever owns gantries, and what about locations where there aren't any existing gantries?

What about insurance in case you camera falls off the gantry onto a car and kills someone?

Edit: What about roads that don't have network coverage (not that uncommon in the Scottish Highlands)

[londons_explore]

You wouldn't get permission. Just walk with a phone+solar panel in a weatherproof box. Either use magnets or zip ties to tie to the the pedestrian rail of a bridge overlooking a freeway. Done.

I would likely order some chinaphone motherboards only - for example[1] - without the screen+case+accessories you save ~50% on the retail price. They're then not valuable enough to be worth stealing either.

If it's a small road with no bridges, tie to a lamp post instead.

You need to be able to install 3 per hour to make the finances work out - 10 mins driving, and 10 mins installing, and repeat.

If the city catches you, it's only a littering penalty. They likely wouldn't care.

[1]: https://www.aliexpress.com/item/1005003892325502.html

Breakeven is 1 year average residency - that has to include failure, end-of-life, theft, and removal by the city.

[arethuza]

Anything placed in a location which has easy accessed to pedestrians is going to get stolen and vandalised - particularly once people realise what they are.

[n4r9]

How much power do you need to be continuously running video/snapshots, OCR software, and comms? How expensive a solar panel is needed to generate that power, will it work overnight and through the winter, and will it also be theft-resistant? What's the cost of petrol for driving 4+ hours per day? How will you get coverage in parts of the country that aren't near your home/office?

[londons_explore]

About 1.2 watts to capture+process 1 frame/second - thats how much my current phone uses, and I suspect a cheaper platform will be more power efficient. You'd use a 5 watt solar panel (costing $4) in the southern USA, and a 10 watt panel (costing $9) in the northern USA. You would aim to rarely have spare power - in winter, you just drop the frame rate and the comms interval.

With more engineering effort, you can probably dramatically reduce power usage, for example by discarding parts of the frame that cars never drive through, which should allow extending the hardwares lifespan as batteries age and solar panels get covered in dust.

[n4r9]

Well, I'm slightly less skeptical than I was before. I'm not convinced you can break even for much less than $100 per instance, and I think the risk of getting into trouble is quite high, but there could be something to it.

[arethuza]

There is a fairly new automated weather station at the side of the road not far from where I live here in Scotland - the solar cells are actually quite large - I'd guess about 0.50m by 1m. The whole setup is also pretty substantial probably to cope with the fact that supporting solar panels in a windy location requires a fair bit of strength!

[generalizations]

Love the style, but wouldn't those boxes be conspicuous? It only takes a few observant people to notice a couple before they spot the pattern and see them everywhere. Then it seems like the game would be up.

[LegitShady]

if the city catches you and finds you installing multiple cameras on their infrastructure for private surveillance youre pr0jably going to get charged with all sorte of business violations that will cost you thousandw ler camera plus the citys cost to inspect their infrastruxture.

[doublerabbit]

> What about roads that don't have network coverage

Satellite. you can buy text bundles. Sure the kit would cost a little bit more, but nothing major.