joost schouppe
In many places we have good Mapillary coverage, and we can find the traffic signs there. (I could lend you a GoPro and bike or car mount to collect the images!) Otherwise, we just make notes (online or on our own device) of where all the signs are and then complete the zone. In Flanders, there's a database of all the traffic signs we can use BUT it is outdated in most municipalities. It is worth asking the municipality if they have a recent map of the speed limits, but very often those maps aren't completely correct or outdated. So they can help, but aren't always that useful.
