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Maryland Route 180 (MD 180) is a state highway in the U.S. state of Maryland. Known for most of its length as Jefferson Pike, the state highway runs from U.S. Route 340 (US 340) in Knoxville east to Ballenger Creek Pike and Interstate 70 (I-70) in Frederick. MD 180 is the old alignment of US 340 through Knoxville, Petersville, and Jefferson in the Middletown Valley of western Frederick County. The state highway was originally constructed in the early 1910s and designated US 340 in 1927. MD 180 was assigned to the highway bypassed by the US 340 freeway between Sandy Hook in far southern Washington County and Jefferson in the mid-1960s. The state highway was extended east to Frederick and south along Ballenger Creek Pike (former MD 351) after the US 340 freeway was completed in the late 1960s. MD 180 was rolled back to Frederick and removed from Washington County in 1989. ==Route description== MD 180 begins at a partial interchange with US 340 (Jefferson National Pike) just east of the southern end of South Mountain at the Potomac River. There is no access from westbound MD 180 to eastbound US 340 or from westbound US 340 to eastbound MD 180. The state highway heads east as two-lane Jefferson Pike, which parallels the Chesapeake and Ohio Canal and CSX's Metropolitan Subdivision to the village of Knoxville. MD 180 makes a sharp curve to the northeast in which the highway intersects MD 478 (Knoxville Road), which parallels the railroad, canal, and river east to Brunswick.〔〔 MD 180 heads northeast and temporarily gains an eastbound climbing lane as it leaves the narrow Potomac River valley. The state highway passes through farmland and meets MD 17 (Burkittsville Road) at a roundabout west of Rosemont. MD 180 crosses Little Catoctin Creek on its way to Petersville, where the highway meets the northern end of MD 79 (Petersville Road). East of Petersville, the state highway has a diamond interchange with US 340. MD 180 descends into the narrow valley of Catoctin Creek; the westbound direction has a short climbing lane. The state highway curves north to cross the creek, then curves back east and leaves the creek valley. MD 180 has a single ramp to westbound US 340 and meets the southern end of MD 383 (Broad Run Jefferson Road) before passing through Jefferson. The state highway intersects Old Middletown Road, which heads north past the George Willard House, and Holter Road and Lander Road; Holter Road heads north toward Middletown and Lander Road heads south from the same intersection toward an interchange with US 340.〔〔 MD 180 parallels US 340 through a wide gap in Catoctin Mountain and continues northeast to the hamlet of Feagaville, where the highway intersects Mt. Zion Road and traverses Ballenger Creek. MD 180 crosses over I-70 (Eisenhower Memorial Highway) and intersects Butterfly Lane near Saint John's Catholic Prep before beginning a sweeping curve to the south. The state highway intersects Himes Avenues, which is unsigned MD 180B and leads to a ramp to westbound US 340 and US 15, at the same intersection as a ramp from that direction of the freeway. MD 180 crosses over US 340 and US 15 and receives a ramp from the eastbound direction of the freeway, then intersects Solarex Court and a ramp to the eastbound freeway that indirectly provides access to westbound I-70. Solarex Court provides access to a business park in the triangle formed by I-70, Jefferson National Pike, and the Frederick Freeway; this business park includes the historic home Linden Grove. MD 180 continues south as Ballenger Creek Pike, passing under I-70 before reaching its eastern terminus at Ballenger Center Parkway and a ramp to eastbound I-70 and I-270. Ballenger Creek Pike continues south through the suburb of Ballenger Creek.〔〔 MD 180 is part of the National Highway System between US 340 and MD 478 as part of an intermodal connection with the Brunswick train station on MARC's Brunswick Line.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Maryland Route 180」の詳細全文を読む スポンサード リンク
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