Turkey has an extensive network of well maintained roads linking its towns, cities,and popular tourist areas. When arriving from Europe, the Bosphorus crossing to Asia has been greatly facilitated by the completion of the Istanbul bypass, and the two Bosphorus (Bogazici) bridges which lead to the Istanbul - Ankara Expressway. The E80 and E90 are the two main roads leading to Turkey from European borders, they also link the Iranian and Iraqi borders. These expressways have been constructed according to Asian and Middle East International road network standards.