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In the late 1990s, the Israel Ministry of Transport planned to construct Highway 45 from Highway 1 near Ben Gurion International Airport through the West Bank passing slightly north of Beit Horon and Beit Ur al-Fauqa to the Atarot Industrial Park in Jerusalem.
One of these studies was conducted be the Texas department of transportation that studied the karst environment along highway 45 in Texas.
Minnesota State Highway 45 is a short highway in northeast Minnesota, which runs from its intersection with State Highway 210 (Chestnut Avenue) and Carlton County Road 1 in the city of Carlton and continues north to its northern terminus at its interchange with Interstate 35 and Carlton County Highway 45 in the city of Scanlon.