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Maryland Route 23 (MD 23) is a state highway in the U.S. state of Maryland. The state highway runs from U.S. Route 1 (US 1) in Hickory north and west to the Pennsylvania state line near Norrisville, where the highway continues as Pennsylvania Route 24 (PA 24). MD 23 is an L-shaped highway in northwestern Harford County that consists of two major sections. Between US 1 and MD 165 in Jarrettsville, MD 23 is marked east–west along a two-lane controlled access road named East–West Highway. From MD 165 to the state line, the state highway is marked north–south along Norrisville Road, a rural two-lane highway that passes through the villages of Madonna and Shawsville. The two sections of MD 23 are connected by a short concurrency with MD 165. MD 23 from Hickory to Jarrettsville was one of the original state highways marked for improvement by the Maryland State Roads Commission in 1909 and one of the original state-numbered highways in 1927. The state road was constructed from Hickory to Jarrettsville and from Norrisville to the state line in the early to mid-1910s. The gaps between Jarrettsville and Shawsville and from Shawsville to Norrisville were filled in the early 1920s. East–West Highway was constructed in the early 1960s to replace the parallel Jarrettsville Road. MD 23's eastern terminus was moved to US 1's new bypass of Hickory in 2000. ==Route description== MD 23 begins at an intersection with US 1 (Hickory Bypass) in Hickory. The state highway heads west as two-lane East–West Highway. MD 23 passes through a commercial area where the highway intersects US 1 Business (Conowingo Road) and Water Tower Way before the road passes through a narrow forested corridor. The state highway intersects Commerce Road at a roundabout; Commerce Road heads north into an industrial park surrounding Forest Hill Airport. After crossing over Bynum Run and the Ma and Pa Trail, a rail trail along the abandoned right-of-way of the Maryland and Pennsylvania Railroad, MD 23 intersects MD 24 (Rocks Road/Rock Spring Road) just south of Forest Hill. MD 23 continues west through a mix of farmland and forest, passing south of the hamlet of Fairview and crossing over Phillips Mill Road and Morse Road before East–West Highway reaches its western terminus at MD 165 (Baldwin Mill Road) south of Jarrettsville.〔〔 MD 23 turns north and joins MD 165 in a concurrency to the center of Jarrettsville. MD 165 continues north as Federal Hill Road and MD 23 turns west onto Norrisville Road; the east leg of the intersection is Jarrettsville Road. MD 23 heads west through farmland and intersects MD 146 (Jarrettsville Pike) and Madonna Road in the village of Madonna. The state highway gradually curves to the north through Shawsville, where MD 23 intersects two highways that head west into Baltimore County, MD 138 (Troyer Road) and MD 439 (Old York Road). The state highway makes a sharp, curvaceous descent to a crossing of Deer Creek, next to which is the historic Ivory Mills complex. MD 23 ascends out of the forested creek valley into Norrisville and meets the north end of MD 136 (Harkins Road). The state highway continues north to just south of the Pennsylvania state line. MD 23 turns west and closely parallels the state line for about before the highway veers northwest to cross the border. The highway continues north as PA 24 (Barrens Road) toward Stewartstown.〔〔 MD 23 is a part of the National Highway System as a principal arterial from US 1 in Hickory west to High Point Road west of Forest Hill.〔〔 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 23」の詳細全文を読む スポンサード リンク
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