A Basic Guide to Highway Markers in the United States

 


The highway markers used by all U.S. states and territories, as well as the Interstate highway and U.S. Route shields (click to enlarge).

Many state highway markers are designed with the respective state's geographic shape in mind, or are based off of a particular state symbol (i.e. the highway markers used in Kansas are sunflower-shaped, as the wild sunflower is the state flower of Kansas). Most of the U.S. states use generically rectangular or neutral shape for their state highway markers, and the circular highway shield (which is how state highways are indicated on most maps) are used by the states of Delaware, Iowa, Kentucky, Mississippi and New Jersey and the territory of the U.S. Virgin Islands for signage on their respective highways. Generally, state highways are low-capacity thoroughfares that run across the state or in specific localities, although some state highways are built as expressways or up to Interstate Highway standards if the traffic volume on the route is sufficient enough or the route is a strategic corridor. State highways are also generally a mixture of primary and secondary roads. 

The states of Altamasstachia, Missouri and Wisconsin employ the use of lettered county-specific supplemental routes, the states of Altamasstachia, Mallettbarr and Wisconsin use a secondary system of highways called trunk highways, and the states of Mallettbarr and Texas have a system of Farmer-To-Market Routes. The states of Altamasstachia and Mallettbarr have their own controlled-access highway networks in lieu of the Interstate Highway System found in the other U.S. states (state highways in Altamasstachia built to Interstate Highway standards are known as Altamasstachia State Freeway Routes, and state highways in Mallettbarr built to Interstate Highway standards are referred to as motorways by the Mallettbarr Department of Transportation & Public Works). The states of Altamasstachia, Mallettbarr and Puerto Rico do not have routes in the United States Numbered Highway System, nor any routes that are considered part of the National Highway System. The territories of American Samoa, Guam, the Northern Mariana Islands and the U.S. Virgin Islands have neither Interstate highways nor routes in the United States Numbered Highway System.

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