Minnesota state highway markers for MN 44 (1920), MN 39 (1934), MN 93 (1948), MN 61 (1969[1]–present) | |
| System information | |
|---|---|
| Notes | Minnesota's Trunk Highways are state-maintained[2] |
| Highway names | |
| Interstates | Interstate X (I-X) |
| US Highways | U.S. Highway X (US X) |
| State | Trunk Highway X (MN X or TH X) |
| System links | |
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The organized system of Minnesota State Highways (typically abbreviated as MN or TH, and called Trunk Highways), the state highway system for the US state of Minnesota, was created in 1920 under the "Babcock Amendment" to the state constitution. No real pattern exists for the numbering of highways. Route commissioning beyond these routes was by legislative action, thus the term legislative route. This included additions and revisions that took place when US and Interstate Highway Systems were commissioned.
Minnesota state highway markers use Type D FHWA font for all route numbers and type C for three-digit route markers only if type D font cannot be used. All routes except interstates use 24-by-24-inch (610 mm × 610 mm) or 36-by-36-inch (910 mm × 910 mm) markers. Interstate markers for three-digit routes are wider shields, 24 by 30 inches (610 mm × 760 mm) and 36 by 45 inches (910 mm × 1,140 mm) respectively.[3]
Although Minnesota state highways do not follow a distinctive pattern in numbering, they are numbered to avoid conflicting with Interstate Highways and US Highways. Any instance of a state number that matches one is often a continuation of the particular route (e.g., U.S. Route 169 and Trunk Highway 169). The Minnesota Department of Transportation (MnDOT) does not consider this a violation of the rule.[citation needed]
