The A51 is a motorway in Switzerland, it leads from Bülach to Zürich.
Legend: (very good) | (good) | (average) | (bad) | (senseless)
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A1 • A2 • A3 • A4 • A5 • A6 • A7 • A8 • A9 • A12 • A13 • A14 • A16 • A51 • A53