When relocating in the EU, you need to renew your driving license in your country of residence. This is often a simple procedure where you pay the fees and exchange your old license for a new license.
I am currently holding a Belgian license, but I did my driving exam in the Netherlands. Still there are quite some differences in traffic regulations. One would expect that some one having a national license, is familiar with the local laws. Yet I am driving in Belgium and it took me some time to learn the often very slight differences. Regulations regarding fog lights are a nice example. In Holland you are suppose to use your fog lights, when the you have less then 50m sight, whereas in Belgium that is with 100m and with heavy rain. I can list a dozen of these small differences I noticed over time.
Local car association often issue brochures indicating the difference, but as I have learned these brochures are often extremely incomplete.
So when you relocate to a new country, where you simply exchange your driving license for a local one, is there an extensive EU-wide resource one could consult for an elaborate comparison? One could of course read the local road code, but I believe a comparison would be a better resource.