Hi, does roads have to have the same post code? I don't know internal representation of these data, but in mp sources single road can have parts with different post code or city/region. Do you check angle at which roads are merged? Imagine a two-way road, which splits into 2 one-way roads before a crossroad. You can get this one-way roads merged. I don't know if this would be a problem for routing, but a weird layout anyway. Or you can get a crossroad where roads can be merged in many configurations. In that case I would prefer to get straight roads after merging. If you merge two roads, that form a turn at a crossover, there could be missing announcement from navigation. This probably depends on angle, but I'm not sure about details. Again, I prefer to merge only roads that goes nearly straight. -- Best regards, Andrzej