Location: S Bismarck Expy and 9th St, Bismarck No reassurance shield after the 1804 junction, which isn’t surprising since 81o is unsigned. Location: S Bismarck Expy and Main Ave, Bismarck About a mile later, we’ll approach Main Avenue, which is I-94 Business. 94 Business west heads to downtown Bismarck. Stay straight for 94 Business east/810, … Continue reading North Dakota Highway 810, ND-1804 to I-94 Bus