AARoads Forum

National Boards => General Highway Talk => Topic started by: Mapmikey on August 30, 2013, 10:57:04 AM

Title: Permanently Grounded Interstates
Post by: Mapmikey on August 30, 2013, 10:57:04 AM
Not for their inappropriate behavior...

As a converse to the recent elevated interstates thread, what is the longest interstate that crosses no bridges at all?

Virginia has I-381 (1.14 mi)

Mapmikey
Title: Re: Permanently Grounded Interstates
Post by: hotdogPi on August 30, 2013, 11:08:45 AM
These both go under every other road:

MA 213, although it's not an interstate.
I-95 in New Hampshire goes under every route. Some non-routes don't though, and this isn't all of I-95.

This is ignoring rivers.
Title: Re: Permanently Grounded Interstates
Post by: getemngo on August 30, 2013, 05:13:49 PM
I'm mildly disappointed to find that I-180 in Wyoming does not fit the bill.  :pan:

But yeah, "does not cross over any roads" (entirely depressed) would make for a longer discussion than "has no bridges."
Title: Re: Permanently Grounded Interstates
Post by: Beeper1 on August 30, 2013, 06:23:02 PM
Quote from: 1 on August 30, 2013, 11:08:45 AM
I-95 in New Hampshire goes under every route. Some non-routes don't though, and this isn't all of I-95
This is ignoring rivers.

I think I-95 in NH passes over the Spaulding Turnpike/US-4, and a couple of local roads in Portsmouth.
Title: Re: Permanently Grounded Interstates
Post by: hotdogPi on August 30, 2013, 07:40:47 PM
I thought "grounded" already meant it could pass under.
Title: Re: Permanently Grounded Interstates
Post by: deathtopumpkins on August 30, 2013, 07:46:57 PM
In addition to a multitude of small rivers, 95 also crosses over a minor road  (http://goo.gl/maps/XANq0)near NH 27/101, railroad tracks (http://goo.gl/maps/w3BsZ) a mile and a half before the Turnpike split, the northbound Spaulding Turnpike ramps (http://goo.gl/maps/oNyo4), the Spaulding Turnpike approach to the Circle (http://goo.gl/maps/rG9jD), Woodbury Ave (http://goo.gl/maps/B8ROq), Maplewood Ave (http://goo.gl/maps/VqGko), Market St (http://goo.gl/maps/CRrG5), and then more railroad tracks and industrial driveways as part of the Piscataqua Bridge. So it's out.
Title: Re: Permanently Grounded Interstates
Post by: hotdogPi on August 30, 2013, 07:50:51 PM
I have only gone up to exit 4. I didn't realize there were lots of exceptions past that.
Title: Re: Permanently Grounded Interstates
Post by: vdeane on August 30, 2013, 09:23:44 PM
I-878 fits the criteria perfectly.  It's also the shortest interstate and not signed.  I think these are all related ;)

Depending on how tunnels count, I-78 in NY as well.  And I-478.  I'm seeing a pattern here.

Quote from: getemngo on August 30, 2013, 05:13:49 PM
I'm mildly disappointed to find that I-180 in Wyoming does not fit the bill.  :pan:

But yeah, "does not cross over any roads" (entirely depressed) would make for a longer discussion than "has no bridges."
I-587 does though, if you don't count the river.
Title: Re: Permanently Grounded Interstates
Post by: andy3175 on August 30, 2013, 10:27:56 PM
Quote from: getemngo on August 30, 2013, 05:13:49 PM
I'm mildly disappointed to find that I-180 in Wyoming does not fit the bill.  :pan:

But yeah, "does not cross over any roads" (entirely depressed) would make for a longer discussion than "has no bridges."

Interstate 180 in Wyoming passes over Deming Drive (just north of the Interstate 80 interchange) and the Union Pacific Railroad yard in Cheyenne.

Regards,
Andy
Title: Re: Permanently Grounded Interstates
Post by: 31E on August 30, 2013, 10:52:24 PM
I-270 Spur in Maryland is 2.1 miles long and it goes under every road.
Title: Re: Permanently Grounded Interstates
Post by: TEG24601 on August 31, 2013, 03:37:40 PM
I-375 in Detroit is entirely depressed, with M-3 and I-75 passing over it, and it ending on the surface at M-10, near the Renaissance Center.


I-705 in Tacoma I believe is surface only for its entire length, but I could be wrong.
Title: Re: Permanently Grounded Interstates
Post by: SteveG1988 on August 31, 2013, 07:36:23 PM
Except for a few creeks I-195 in NJ just has over/underpasses

Does it count if it is at a state line and has a bridge there? if not, I-95 in delaware, or I-495 in DE

Going with the state line thing, I-676 only crosses a river once, at I-76 and the suchkyll river, between there and I-95 all crossigns are overpasses with 676 being depressed
Title: Re: Permanently Grounded Interstates
Post by: Kacie Jane on August 31, 2013, 09:39:23 PM
Quote from: TEG24601 on August 31, 2013, 03:37:40 PMI-705 in Tacoma I believe is surface only for its entire length, but I could be wrong.

Very few (but not 0) roads pass underneath it -- and most of those that do are near its termini -- but it does have some elevated portions even with out those.
Title: Re: Permanently Grounded Interstates
Post by: Alps on September 02, 2013, 11:44:54 AM
Quote from: SteveG1988 on August 31, 2013, 07:36:23 PM
Except for a few creeks I-195 in NJ just has over/underpasses

Does it count if it is at a state line and has a bridge there? if not, I-95 in delaware, or I-495 in DE

Going with the state line thing, I-676 only crosses a river once, at I-76 and the suchkyll river, between there and I-95 all crossigns are overpasses with 676 being depressed
you clearly have not read the original question
Title: Re: Permanently Grounded Interstates
Post by: roadman65 on September 04, 2013, 07:43:20 AM
I-4 from FL 44 to US 92 (Exit 129) in Volusia County, FL is almost 11 miles without any crossings of any kind.  That is the longest I know of regionally where I live.