United States/Unusual highway networks

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The United States has a significant number of highway networks, especially at the state and local level, which are not easily translated into network=* and ref=* values on their route relations. This page catalogs those networks and provides links to community discussions regarding the tagging of those networks.

Table of Unusual Networks

State Road / System Example
Route Relation 		Tagging Scheme
or Example 		Shield Example Ref on Sign?[1]
California 49-Mile Scenic Drive relation 109668 network=US:CA:San_Francisco:49_Mile_Scenic_Drive
No ref 		N/A
Connecticut Merritt Parkway relation 15425309 network=US:CT:Parkway
No ref 		N/A
Illinois, Indiana, Kentucky Lincoln Heritage Trail relation 14976736 (incomplete) network=US:LHT
No ref 		N/A
Illinois, Indiana, Ohio Ohio River Scenic Byway relation 16058238 (incomplete) network=US:ORSB
(ref varies by state) 		N/A
Indiana, Ohio John Hunt Morgan Heritage Trail relation 15504667 (Ohio, incomplete)
No route relation yet in Indiana 		network=US:OH:JHMHT in Ohio Indiana Ohio N/A
Iowa et al. Avenue of the Saints No route relation yet N/A N/A
Louisiana Lake Pontchartrain Causeway relation 13781610 network=US:LA:Causeway
No ref 		[2] N/A
Minnesota (et al) Great River Road relation 456651 network=US:GRR
No Ref 		N/A
Minnesota Amish Buggy Byway No route relation yet N/A N/A
North Carolina; Virginia Blue Ridge Parkway relation 55450 network=US:NPS:Blue_Ridge
No ref 		N/A
Ohio Lake Erie Coastal Ohio Trail relation 14287121 network=US:OH:LECO N/A
Ohio Ohio & Erie Canalway Scenic Byway relation 3693700 network=US:OH:OEC Initialism
Ohio et al. Great Lakes Circle Tour relation 4744198 network=GLCT
ref=LECT 		Initialism
Tennessee Tennessee Scenic Roadways no known examples No Consensus (2022-02-11)
variable
Tennessee; Alabama; Mississippi Natchez Trace Parkway relation 3300032 network=US:NPS:Natchez_Trace
No Ref 		N/A
Muliple Historic US Routes relation 3734770 network=US:US:Historic
Typically No Ref, but some ways have ref=HR 66 		N/A

Discussions

See also

References

  1. ↑ Indicates whether or not the ref is listed on the sign verbatim. Routes listed as "Initialism" have ref values derived from names listed on signage but do not have the initialisms as a standalone increment of text.
  2. ↑ The shield only appears on mile markers frequently posted along the roadway. The route is prominently identifiable on wayfinding signage but not using the shield.
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