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department and the state highway commission as well as enacted various laws aimed at improving transportation in the state. In 1920, recognizing that economic prosperity and growth are highly related to good transportation, the legislature passed a $ 60 million bond issue for road work. This effort, along with the
Centennial Road Law passed by the legislature in 1921, shifted highway building efforts in Missouri from the local level to the state level. As a result, the state highway commission undertook an aggressive road building campaign throughout the 1920s and 1930s aimed to get Missouri "out of the mud".
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The more major supplemental routes of the system are assigned single-letter designations (such as "K"). Minor branch routes and farm-to-market roads, which often end at county roads or are former alignments of the other highways, are typically assigned two-letter designations consisting of two of the
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It is erroneously believed that due to these roads being designated by letters rather than numbers and their existing in more than one county that these roads are county roads, not state highways, with some businesses and residences located on these roads saying their address is "County Road A" for
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Prior to 1907, all road improvement activities in
Missouri were undertaken by the individual counties, with little expertise or coordination between them. Amid growing automobile presence and insufficient road networks in Missouri in the ensuing years, the state legislature created a state highway
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In 1952, the state highway department embarked on its
Missouri 10-Year Highway Modernization and Expansion Program. Through this effort, the state assumed maintenance responsibility of over an additional 12,000 miles (19,000 km) of secondary and farm-to-market roads previously managed by the
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example. This may have also arisen from the signage used prior to the early 1960s, where the letter was painted black against a white background, with the words "STATE ROAD" above the letter and the county name (in all capital letters) below the letter, or from the use of letters representing
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counties. The goal of the secondary highway system was to place state-maintained roads within 2 miles (3.2 km) of more than 95% of all rural farm houses, schools, churches, cemeteries and stores. Most of
Missouri's lettered supplemental highways are the result of this program.
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Supplemental routes are signed by black letters on a white background with a black border. Rarely, the shields will be marked with banners such as EAST, WEST, or END. There are no business or bypass routes for the roads; however, seven examples exist of
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The vast majority of the highways in the system are designated with 19 letters of the alphabet. The letters "G", "I", "L", "Q", and "S" are not used because of the potential confusion with other letters and numbers. The only use of X is on Route AX in
235:. Combinations beginning with the letter R are also used for routes that connect with state parks or other recreational facilities, which is the only use of R on the system; Route AR, south of
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same letters (e.g. "KK"). Additionally, combinations of letters may be used, but always with A as the first letter (such as "AD"); the only exceptions to this are Route BA in western
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was given in 1952 to maintain in addition to the regular routes, though lettered routes had been in use from at least 1932. The four types of roads designated as Routes are:
258:. Designations are also reused, but not usually in the same county but can connect to another county with the same letter. In some cases, supplemental routes will share a
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Supplemental routes rarely run for more than a few miles, although they may cross county lines. A route's designation may sometime change when crossing at a
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Supplemental routes make up 19,064 miles (30,681 km) (59%) of the state highway system.
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Short routes connecting state highways from other states to routes in
Missouri
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375:"Missouri Highways and Transportation Commission: Commission Background"
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220:. Bottom: Spur Route N detaches from its parent route in
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398:Map of Missouri Showing State Road System in 1932
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285:Union Covered Bridge State Historic Site
433:. Missouri Department of Transportation
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315:. Then, one connector route: Connector
297:Sappington Cemetery State Historic Site
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144:Missouri Department of Transportation
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307:) in Shelby County, Spur Route V in
341:Missouri Route M (Jefferson County)
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33:Missouri Supplemental Route System
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134:is a state secondary road in the
329:county trunk routes in Wisconsin
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460:. December 25, 1952. p. 1.
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98:Missouri State Highway System
404:(Map). MoDOT. Archived from
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478:State highways in Missouri
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295:, Spur Route AA (to the
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159:Former alignments of
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187:Highway designations
150:Farm to market roads
303:, Spur Route J (to
283:, Spur Route C (to
275:: Spur Route N in
60:for Routes A and BB
458:Sikeston, Missouri
279:, Spur Route C in
256:Interstate highway
132:supplemental route
66:System information
452:"State Highway".
313:Montgomery County
163:or state highways
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89:System links
293:Cass County
273:spur routes
260:concurrency
237:Bakersfield
155:state parks
437:January 4,
381:January 4,
352:References
252:U.S. Route
106:Interstate
153:Roads to
138:state of
472:Category
335:See also
140:Missouri
84:Route xx
317:Route M
305:Sigsbee
266:Signage
174:History
71:Formed
409:(PDF)
402:(PDF)
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161:U.S.
136:U.S.
74:1952
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
