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Maryland Route 3
Maryland Route 3 (MD 3), part of the Robert Crain Highway, is the designation given to the former alignment of U.S. Route 301 from Bowie, Maryland, USA, to Baltimore. It is named for Robert Crain of Baltimore. It is unique in Maryland in that it has a business route and a truck route which do not connect to their parent; however, the business route is also a part of the Robert Crain Highway. MD 3's current orientation is vestigial from the construction of Maryland's freeway system.
==Route description==
MD 3 begins within the modified cloverleaf interchange of John Hanson Highway (Interstate 595, better known as US 50) and Robert Crain Highway (US 301). Within the interchange, US 301 exits Crain Highway northbound and joins US 50 eastbound; meanwhile, Crain Highway continues northbound, beginning MD 3. After passing through another interchange with Belair Drive, containing continuing connections from the US 50/US 301 interchange, MD 3 turns northeastward, widening to eight lanes and intersecting MD 450 from the west. Here, MD 450 joins MD 3 for a short distance, crossing the Patuxent River and entering Anne Arundel County, leaving to the east approximately half a mile later.
After MD 450 leaves, MD 3 narrows to six lanes and continues northward, passing through Crofton. It first passes to the west of several subdivisions, then enters a commercial area. As it does so, it crosses MD 424 and turns to the northeast again. Along this stretch, the median between the carriageways is up to in width; several fast-food restaurants occupy the median in this area. The route was upgraded to this format in its persona as US 301 in 1954. The route continues in this orientation for the remainder of its route as it passes through Millersville, narrowing to four lanes at St. Stephen's Church Road and then entering a wooded area, where the route meets a final interchange with MD 32 and I-97. Interstate 97 passes under MD 3 and occupies its median for a very short distance, with MD 3 ending at ramps merging into I-97. The roadway of MD 3, however, continues for a minor distance longer, the southbound carriageway turning and crossing underneath I-97 to join with the northbound on the east side of the Interstate, and continuing north as Veterans Highway, running parallel to I-97.
The route is severely congested; attempts to bypass it with new routings have failed. One such routing would have been Interstate 297, a direct freeway link between Interstate 97 and US 50/US 301/I-595.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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