State Routes on Islands

[ajlynch91]

MI-185 on Mackinac Island and OH-357 in the Bass Islands got me thinking, are there any other state routes on Islands not connected to any others on the mainland? Route 440 in Staten Island and I suppose the Hawaiian routes wouldn't count, unless there were routes that didn't connect to any other routes.

[busman_49]

Kelley's Island has OH 575

[Pete from Boston]

Long Island is full of them, as long as you're only talking about direct connections. 

[dgolub]

Long Island is full of them, as long as you're only talking about direct connections.

I think he was talking about islands that have no road connection to the mainland.  Shelter Island would probably qualify.  NY 114 has three separate segments on the South Fork, on Shelter Island, and on the North Fork.  They're connected by ferries, but there's no bridge to Shelter Island.

[Mapmikey]

NC 12 on Ocracoke Island also qualifies

NC 345 and the brief NC 346 qualified from 1922-31...

NC 615 would probably not although its mainland connection is to a non-primary City of Va Beach road.

Mapmikey

[1995hoo]

New Brunswick Route 772 on Deer Island and Route 776 on Grand Manan Island (both connect to other routes on the mainland via ferries)

I don't know whether New Brunswick Route 774 on Campobello Island would qualify for purposes of the original question. It doesn't connect to any Canadian roads except via the ferry to Deer Island, but it's connected to Maine's highway system (and thus, quite indirectly, back to New Brunswick's) via the bridge to Lubec. It wasn't clear to me whether the OP intended to disqualify roads with any connection to the mainland or whether the international border crossing would allow this one to count.

[oscar]

AK 7's Ketchikan and Petersburg segments are on islands, with ferry connections to the mainland.

Since most significant roads in Alaska are state-maintained, there are a lot of other unnumbered roads that could be called "state routes", on islands connected to the mainland only by ferry, including for starters the Sitka, Unalaska/Dutch Harbor, and Kodiak road networks.

HI 440 on Lanai island is out there by itself, unlike the multiple state routes on most of the state's other islands (which the OP clearly excluded).  Like Mackinac Island, only a passenger ferry surface connection from Lanai to anywhere else. 

Stretching "state" a little, you have at least two Canadian islands with just one numbered route, connected to the mainland only by ferry, the BC/TCH 16 segment in the Queen Charlotte Islands, and QC 199 in the Iles de la Madeleine.  Vancouver Island and Newfoundland island have extensive provincial route networks (including their own TCH segments) with only ferry connections, but those are similar to the Hawaii state route networks the OP excluded.

[ajlynch91]

Specifically I'm looking for state routes that have NO connection to the mainland whatsoever, other than ferries. So even if a road were only on Long Island, for example, the fact that Long Island is well-connected to mainland New York would disqualify. The Shelter Island example is something I'm interested in.

[WashuOtaku]

NC 12 on Ocracoke Island also qualifies

NC 345 and the brief NC 346 qualified from 1922-31...

NC 615 would probably not although its mainland connection is to a non-primary City of Va Beach road.

Mapmikey

The way OP described it, I don't believe any NC route qualifies because it begins/ends or connects somewhere in the middle with another route.  North Carolina has made efforts to not have any isolated state route on the map.  Even on Ocracoke Island, NC 12 connects with NC 45 at ferry terminal.

[froggie]

The way OP described it, I don't believe any NC route qualifies because it begins/ends or connects somewhere in the middle with another route.  North Carolina has made efforts to not have any isolated state route on the map.  Even on Ocracoke Island, NC 12 connects with NC 45 at ferry terminal.

OP clarified that ferries don't count as connections, so since 12 and 45 technically don't have a roadway connection on Ocracoke, I'd count it.

[catch22]

MI-185 on Mackinac Island and OH-357 in the Bass Islands got me thinking, are there any other state routes on Islands not connected to any others on the mainland? Route 440 in Staten Island and I suppose the Hawaiian routes wouldn't count, unless there were routes that didn't connect to any other routes.

Another one in Michigan is M-154 on Harsens Island.

[1995hoo]

The way OP described it, I don't believe any NC route qualifies because it begins/ends or connects somewhere in the middle with another route.  North Carolina has made efforts to not have any isolated state route on the map.  Even on Ocracoke Island, NC 12 connects with NC 45 at ferry terminal.

OP clarified that ferries don't count as connections, so since 12 and 45 technically don't have a roadway connection on Ocracoke, I'd count it.

I think the way Mapmikey worded it is exactly right when he referred to Route 12 "on Ocracoke Island." That is, it would clearly be incorrect to say NC Route 12 has no connection to other routes on the mainland, as it obviously does. If you limit it to that one piece, then that particular segment falls within what the OP was describing. It's a case of deciding whether it's proper to count one segment of a longer road.

If worst comes to worst, give it an "honorable mention."

[NE2]

Tangier Island (Virginia) has some secondary routes.

Nantucket and Martha's Vineyard have a number of state highways, but none are numbered.

[Mapmikey]

Tangier Island (Virginia) has some secondary routes.

Here is your fun fact about Tangier's SRs:

They have had SRs back to 1932 when the secondary system was created in Virginia.  In 1958 they had 11 numbered streets (T1301-T1311).  An article in the early 1950s in the Virginia Highway Bulletin said there was exactly 1 registered vehicle on Tangier Island in 1950.    11 routes for 1 vehicle is a very large ratio...

Mapmikey

[OCGuy81]

I'd say that Washington State probably has a few in the Puget Sound area that would qualify.

Another would be in Wisconsin, though I can't think of the name of the island off the tip of Door County, but I *think* there is a state route on it.

[ajlynch91]

^I think you're referring to Washington Island in Wisconsin, which has County Route H on it.

[Mr. Matté]

LA 1141 on Monkey Island, Louisiana. There used to be a ferry connection but has since been discontinued when a hurricane swept through in 2005. Still state-maintained as of 2012:  http://wwwsp.dotd.la.gov/Inside_LaDOTD/Divisions/Multimodal/Data_Collection/Mapping/Parish%20Maps/Cameron_Central.pdf

[NE2]

I'd say that Washington State probably has a few in the Puget Sound area that would qualify.

I don't think so. The ferries themselves are state routes, but the islands don't have any.

Then there's Vancouver Island. And Prince Edward Island. And Newfoundland.

[OCGuy81]

^I think you're referring to Washington Island in Wisconsin, which has County Route H on it.

Ah yes! That's it.  Thanks.

[1995hoo]

I'd say that Washington State probably has a few in the Puget Sound area that would qualify.

I don't think so. The ferries themselves are state routes, but the islands don't have any.

Then there's Vancouver Island. And Prince Edward Island. And Newfoundland.

Oscar beat you to it, although he didn't mention PEI. PEI wouldn't qualify anyway because it's now connected to New Brunswick by a bridge.

....

Stretching "state" a little, you have at least two Canadian islands with just one numbered route, connected to the mainland only by ferry, the BC/TCH 16 segment in the Queen Charlotte Islands, and QC 199 in the Iles de la Madeleine.  Vancouver Island and Newfoundland island have extensive provincial route networks (including their own TCH segments) with only ferry connections, but those are similar to the Hawaii state route networks the OP excluded.

[Kacie Jane]

I'd say that Washington State probably has a few in the Puget Sound area that would qualify.

I don't think so. The ferries themselves are state routes, but the islands don't have any.

Yeah, as far as I can tell, that's correct.  I'm somewhat baffled as to why Vashon Island has a state ferry at each end, but the road connecting the two is not a state highway.  Two more that would be close but no cigar are Bainbridge and Whidbey Islands, which do have state highways, but each is connected to the rest of the road network by a single bridge in addition to ferries.

[Bickendan]

I want to say that Vashon Island used to have a SR on it. I'll have to check the Thomas Guide I have.

[cpzilliacus]

The Nordic nations have a fair number of "state" routes on islands that are only connected to the mainland by ferry.

Bornholm, Denmark: http://goo.gl/maps/B0SOU

Ã...land, Finland: http://goo.gl/maps/myL6R

Gotland, Sweden: http://goo.gl/maps/6eJbX

[bulldog1979]

Michigan has three state trunklines on islands, two of which (M-185, M-154) have been noted already. M-134 uses the ferry to connect from DeTour Village over to Drummond Island. Personally, I've always thought that it would be neat if MDOT designated a trunkline on Beaver Island.