An historic US Highway endpoint in South Sioux City, NE

Photo credits: Jason Hancock; Jeff Morrison

Highway	Approx. time period
US 77	1926-1930
US 73	1932-1965

Today, neither US 20 nor US 77 follow the original highway routes through South Sioux City. Originally westbound US 20 crossed the Missouri River from Sioux City IA and continued due south through South Sioux City on Dakota Avenue (today's Business 20). At 29th Street, US 20 turned west, eventually angling southwest and joining modern US 20 at a point southwest of town. But if you were to continue south of 29th on Dakota, you would've been at the north beginning of US 77. That lasted only a few years, but not long after the US 77 designation had been extended further north to Minnesota, the north end of US 73 was extended up to South Sioux City, and its endpoint was at 29th and Dakota for over 30 years.

Below we're looking south on Dakota at 29th:

Hancock/Morrison, June 2005

Westbound US 20 turned to the right here, and the north beginning of US 77 (and later US 73) was straight ahead. The photo below was taken from the opposite direction (north on Dakota):

Hancock/Morrison, June 2005

That was the original north end of US 77, and later the north end of US 73. Westbound US 20 was to the left, and eastbound was straight ahead. Below we're looking east on 29th:

Hancock/Morrison, June 2005

That was the perspective of eastbound US 20, which continued to the left on Dakota. US 77 and US 73 once began to the right.