U.S. Route 55 - History

History

When the route was designated in 1926, its northern terminus was in Minneapolis at an intersection with U.S. Highway 12, near the Mississippi River. Its southern terminus was in Dubuque, Iowa, at an intersection with U.S. Highway 61 (or possibly U.S. Highway 20). In 1932, US 55 was extended south to Davenport, Iowa, to another intersection with US 61. While US 61 followed a more direct route from Dubuque to Davenport, the new US 55 extension followed the western shore of the Mississippi River.

Just two years later, in 1934, US 55 was deleted entirely. U.S. Highway 67 was extended through Davenport to Dubuque, absorbing the 1932 extension of US 55. The northern half of this stretch was co-signed with an extension of U.S. Highway 52, which took over the US 55 designation to Hampton, Minnesota. From Hampton, US 52 was routed to Saint Paul via Minnesota Highway 56 to Inver Grove Heights and Robert Street into downtown Saint Paul. The remainder of U.S. Highway 55 north and west of Hampton was designated as U.S. Highway 65. The prior routing of U.S. Highway 65 into from Farmington to Saint Paul was redesignated as U.S. Highway 218 for one year, and subsequently redesignated as Minnesota Highway 218, and later as Minnesota Highway 3.

The number "55" was later proposed for the route which would become U.S. Route 56.