Designation
When the mass amount of state legislative routes were assigned in Pennsylvania in 1928, SR 646 consisted of only the stretch from SR 346 in Derrick City to the New York state line. There was no concurrency with SR 346 at that time. The stretch from SR 59 to SR 346 was not state-maintained. The rest of the current SR 646 was an alignment of SR 59. The entire alignment of SR 646 was paved in 1930. Also that year, the stretch from SR 59 in Aiken to SR 46 in Rew was designated as Pennsylvania Route 746, a spur off SR 46.
This set of highways remained intact for over a decade, until 1946, when SR 746 was decommissioned in favor of extending SR 646 over its alignment. Now SR 646 continued along a concurrency with SR 346 and east of Red Rock, it went southward (away from SR 346) down to SR 59 in Aiken, where it ended. In 1952, SR 59 was realigned off its Ormbsy–Aiken alignment, and SR 646 was extended to Ormsby, where it ended at SR 59.
Read more about this topic: Pennsylvania Route 646, History
Famous quotes containing the word designation:
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