US highways 40-49, with branch routes3-digit "branch" routes are listed under their 2-digit "main" route. Highways shown in italics have been decommissioned.
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US 40 US 41
US 43
US 45
US 46
(US 47 has never existed)
US 48 [i] (original)
US 48 [ii] (second)
US 48 [iii] (current)
US 49
- US 141
- US 241 [i] (original) (approved in 1926 but never signposted along most if not all of its route)
- US 241 [ii] (second)
- US 341
- US 441
- US 541
- US 641
US 43
- (US 143 has never existed, although it was proposed by AASHO in the 1930s, and it was shown on some maps)
US 45
US 46
(US 47 has never existed)
US 48 [i] (original)
US 48 [ii] (second)
US 48 [iii] (current)
US 49
Page originally created 1998;
last updated Dec. 23, 2020.
last updated Dec. 23, 2020.
