Portal:Maryland Roads

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Maryland Roads

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The Maryland highway system consists of roads in the US state of Maryland that are maintained by the Maryland State Highway Administration (SHA). The three main systems of roads that comprise the Maryland highway system are Interstate Highways, US Highways, and Maryland state highways. Other roads in Maryland are maintained by individual cities and counties.

Interstate Highways and US Highways are assigned at the national level. Interstate Highways are numbered in a grid—even-numbered routes are east–west routes (the lowest numbers are along Mexico and the Gulf of Mexico), and odd-numbered routes are north–south routes (with the lowest numbers along the Pacific Ocean). US Highways are also numbered in a grid—even numbered for east–west routes (with the lowest numbers along Canada) and odd numbered for north–south routes (with the lowest numbers along the Atlantic Ocean). For this reason, mainline (two-digit) Interstate Highways in Maryland all have numbers between 81 and 97 for north-south routes and between 68 and 70 for east-west routes. In addition, mainline US Highways all have numbers between 1 and 29 for north-south routes and between 40 and 50 for east-west routes. Three-digit Interstate and U.S. Highways, also known as "child routes," are branches off their main one- or two-digit "parents". The Interstate and US Highways are generally maintained by the SHA, with some toll roads maintained by the Maryland Transportation Authority (MdTA) and some roads maintained by municipalities, including most roads in the city of Baltimore. Interstate 95 (I-95) and U.S. Route 40 (US 40) are the longest examples in the state.

Maryland state highways are the other state highways maintained by the SHA. Some state highways are maintained by municipalities while the Maryland Route 200 (MD 200) toll road is maintained by the MdTA. All roads maintained by the SHA are assigned route numbers, ranging from through routes passing through multiple counties to minor service roads that are less than a mile long. Many of the shorter state highways are unsigned. Some routes consists of multiple segments with letter suffixes; these suffixes are unsigned with the exception of MD 835A. There are two geographical clusters for Maryland state highways. The first, ranging from 2 to 37, consists of longer intercounty routes, with 2 to 6 in Southern Maryland, 7 to 10 originally skipped, 12 to 21 on the Eastern Shore, and 22 to 37 running west from Central Maryland to Western Maryland. The second cluster consists of routes from 38 to 378, running across the state from Garrett County in the west to Worcester County in the east. Numbers above 378 are assigned randomly.

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Northern split of MD 313 and MD 318 in Federalsburg

Maryland Route 318 (MD 318) is a state highway in the U.S. state of Maryland. The state highway runs 11.32 miles (18.22 km) from MD 16 and MD 331 at Preston east to the Delaware state line near Federalsburg, where the highway continues east as Delaware Route 18 (DE 18). MD 318 connects Federalsburg with Preston and Bridgeville, Delaware. The state highway follows the DorchesterCaroline county line for most of its length between Linchester and Federalsburg. Further east, MD 318 runs concurrently with MD 313 to bypass Federalsburg. The portion of MD 318 west of Federalsburg was originally numbered MD 319 and assumed by MD 318 in the mid-1950s. The MD 319 section was constructed in the late 1910s near Federalsburg and completed west to MD 331 and MD 16 in the late 1920s. MD 318 east of Federalsburg was built in the mid-1920s. MD 318 was placed on the bypass of Federalsburg in the early 1960s; its old alignment through Federalsburg became MD 315. (more...)

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Northbound MD 97 approaching Howard/Carroll county border
Credit: User:Thisisbossi
Northbound MD 97 approaching Howard/Carroll county border

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