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Ohio State Route numbering schema

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DanTheMan414:

--- Quote from: shoptb1 on January 10, 2010, 11:12:02 PM ---Hello all.  Does anyone know if there is/was an original numbering schema for the Ohio State Highway system?  It seems that like most other states, the lower the number of digits, the more primary the route.  However, is there any type of numbering scheme between 100-800?  Are certain ranges in certain areas of the state, or are they branched off of a parent route?   :hmmm:

--- End quote ---

Generally, the newer Ohio routes have been 400- and 800-series, with the last 2 digits representing a nearby route number.  OH 833 was one example, but two even more recent examples are OH 435, representing part of the former US 35 alignment around the vicinity of I-71, and OH 450, the new, signed route connecting US 50 with I-275.

thenetwork:

--- Quote from: DanTheMan414 on January 11, 2010, 07:52:11 PM ---Generally, the newer Ohio routes have been 400- and 800-series, with the last 2 digits representing a nearby route number.  OH 833 was one example, but two even more recent examples are OH 435, representing part of the former US 35 alignment around the vicinity of I-71, and OH 450, the new, signed route connecting US 50 with I-275.

--- End quote ---


Again, as someone else said, just as you thought you got the hang of the Ohio numbering scheme, they throw you a curve.

SR 421 through Lodi was numbered to reflect US-42 which traversed most of the old alignment before the US-42/US-224 Bypass was built to the north & west of Lodi. Though US 21 was about 20-25 miles east of Lodi, it is a 400-series not related to US 21.

Hot Rod Hootenanny:
Generally speaking 3digit state routes that start with a 4 or 8 were former routings of US routes in Ohio (exception being SR 800 which was formerly SR 8, which got truncated in Akron, for reason unknown to me and SR 844 near Dayton and Wright-Patterson AFB)

I would have mentioned John Simpson's website, but that was already located and quoted in this thread.

VetteDriver16:
Finally clinched Ohio 823, the US-23 bypass of Portsmouth, Ohio.  Certainly a mighty engineering challenge but a job well done nonetheless. 

NE2:
bump
http://www.aaroads.com/forum/index.php?topic=10423.msg252328#msg252328

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