the first section of md 175 was constructed between 1924 and 1926 as a macadam road from us 1 southeast to the entrance of the maryland house of correction east of the b&o railroad (now csx) in jessup. md 175 was extended as a concrete road east to its modern intersection with md 713, then northeast along what later became md 713 to md 176 in hanover in 1929. the easternmost portion of md 175, which was originally md 180, was constructed as a concrete road starting in 1930 from md 3 to the pennsylvania railroad (now amtrak) in odenton; the highway was complete west to gambrills by the end of 1930. the original western part of md 175, from us 1 in jessup to md 103 in ellicott city, was constructed as md 531 in 1932. the portion of the highway through fort meade was a public highway maintained by anne arundel county or the federal government through world war ii.