They used to be positioned like this in the UK but all the ones I’ve seen like this have been removed or moved over the years to places where they could be regarded as more for safety than easy money making.
As such, they're now bright yellow.
* Clearly marked, by law.
* Placed for safety, with some clearly defined legal criteria.
* No data retention, by law.
If you get caught by that, you really need to pay more attention.