Greek National Road 90 (Greek: Βόρειος Οδικός Άξονας Κρήτης, ΒΟΑΚ, Crete Northern Highway) is a national highway of Greece. It runs along the north coast of the island Crete. It connects Kissamos in the west with Siteia in the east, via Chania, Rethymno, Heraklion and Agios Nikolaos. Three sections (the bypasses of the cities Chania, Rethymno, and Heraklion) have been upgraded to motorway standard. These new sections carry the designation A90. The road is part of the European route E75.