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6.17 miles; from US 5/Route 15 in Newington to Hooker Drive (just north of I-84) in West Hartford. The guide signs on I-84 for Exit 41 ("South Main St") don't mention Route 173. |
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Commissioned in 1932, Route 173 originally extended north along Quaker Lane to meet Farmington Ave (at the time, Route 4) in West Hartford, for a length of 7.47 miles. In 1963, that section was deleted. | |
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