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National Boards => General Highway Talk => Topic started by: roadman65 on July 15, 2013, 01:10:07 PM

Title: Longest of Anything
Post by: roadman65 on July 15, 2013, 01:10:07 PM
I know in the road world there are many records just like in sports, you can break it down in many ways.  I here decided to break it down to longest roads in specific areas of my state, county, region, etc.  Here is my list of some record breakers in the part of the nation I live in.

State of Florida
Longest route designation of any kind: US 98 @ 671 Miles
Longest Interstate or Continuous freeway: I-75 @ 471 Miles
Longest State Route (Unsigned) SR 5
Longest State Route (Signed)- SR 20
Longest Divided Highway-US 27.
Longest Gap on Freeway Between Exits in Florida- Florida's Turnpike @ 47 Miles between St. Cloud and Yeehaw Junction



Orange County, FL
 Longest Named and Numbered Road- Colonial Drive (SR 50)




These are all I have to start with for now, but as I come up with more I will add.
US 1

I amended US 19 and US 1 as US 27 blows that two out of the water.  From Miami Springs to Williston, and from Perry to Georgia with the whole 96 miles of US 27 ALT are divided with small undivided center turn lanes in cities and towns.
Title: Re: Longest of Anything
Post by: NE2 on July 15, 2013, 01:19:58 PM
Longest Divided Highway-US 1
There are short pieces with center turn lanes.
Title: Re: Longest of Anything
Post by: formulanone on July 15, 2013, 02:57:28 PM
State of Florida
...Longest State Route (Unsigned) SR 5

I'm sure SR 10 is longer, and mostly unsigned (US 90's secret number).

There's portions of FL 5 that are signed as a standalone state route (i.e. not part of any US Route), and US 1 becomes "SR 805".
Title: Re: Longest of Anything
Post by: agentsteel53 on July 15, 2013, 03:42:15 PM
Longest Divided Highway-US 1
Longest Divided Highway in Transit- US 19 It is almost completely divided within its Florida run.


what is this distinction?

Title: Re: Longest of Anything
Post by: roadman65 on July 15, 2013, 04:17:01 PM
US 19, with the exception of the cities along the way is pretty much divided from its southern terminus into Georgia. 

US 1, has a long two lane stretch in the Lower Keys, so you cannot really say that most of it is divided.  Like NE 2 mentioned there are plenty of places along US 1 with center turn lanes and most of that is in South Florida.

Actually I forgot about US 27.  That is divided much longer than US 19 and US 1.  I need to amend that one.
Title: Re: Longest of Anything
Post by: pianocello on July 15, 2013, 05:07:53 PM
Longest Interstate or Continuous freeway: I-75 @ 471 Miles

Make that 476 miles, you forgot that the freeway continues south/east along SR 924.

On that note, how would TOTSO situations be handled? I would consider the continuous freeway in question to continue along I-595 towards Ft. Lauderdale, not along I-75 toward Hialeah. That would make the mileage a few miles shorter, but it'd still be the longest in the state.
Title: Re: Longest of Anything
Post by: CNGL-Leudimin on July 15, 2013, 05:25:41 PM
Longest motorway-like road in the world: I-90 at 3,101 miles (4,990 kilometers).
Longest motorway-like road outside the U.S.: Chinese G30 at 2,636 miles (4,243 kilometers). I believe it was completed last year, but I doubt about a section in central Gansu.
Title: Re: Longest of Anything
Post by: agentsteel53 on July 15, 2013, 06:12:25 PM
US 19, with the exception of the cities along the way is pretty much divided from its southern terminus into Georgia. 

US 1, has a long two lane stretch in the Lower Keys, so you cannot really say that most of it is divided.  Like NE 2 mentioned there are plenty of places along US 1 with center turn lanes and most of that is in South Florida.

still don't get what you mean by "in transit".
Title: Re: Longest of Anything
Post by: formulanone on July 15, 2013, 06:20:06 PM
Longest Interstate or Continuous freeway: I-75 @ 471 Miles

On that note, how would TOTSO situations be handled? I would consider the continuous freeway in question to continue along I-595 towards Ft. Lauderdale, not along I-75 toward Hialeah. That would make the mileage a few miles shorter, but it'd still be the longest in the state.

I wouldn't consider it a TOTSO. Here's why:

From I-75 "east" to I-75 south: 3-lane ramp
From I-75 north to I-75 "west": 3-lane ramp

From I-75 "east" to I-595 east: 2 thru lanes
From I-595 west to I-75 "west": 2 thru lanes

Since I-75 is effectively 3 lanes in each direction (save the portion approaching the I-595/FL 869 interchanges), and continues with one seamless motion, it's more of a kink in the road than a turn-off-to-stay-on situation.

I-55 north in Memphis, headed out to West Memphis...that's another story.
Title: Re: Longest of Anything
Post by: agentsteel53 on July 15, 2013, 06:43:15 PM
speaking of longest segments of many lanes in each direction... I think we once had a discussion and discovered that I-5 between San Ysidro and the LA county line is the longest freeway which is 4 lanes or more in each direction.  it drops to 3 and then down to 2 through the East LA interchange.
Title: Re: Longest of Anything
Post by: Bickendan on July 16, 2013, 03:20:30 AM
State of Oregon
Longest route designation of any kind: US 30, 478 miles
Longest Interstate or Continuous freeway: I-84, 376 miles
Longest State Route (Unsigned): HWY 2 (I-84)
Longest State Route (Signed): OR 140, 235 miles
Longest Named Route: Oregon Coast Hwy (HWY 9/US 101), 340 miles
Longest Divided Highway: ?
Longest Gap on Freeway Between Exits: I-84/US 30 at 14 miles between exits 109 and 123. The exits in between have no outlet and force you back onto the freeway.
Longest Six Lane Segment (three each direction): I-5, 48 miles from exit 252 to 300. An exception could be made for the Ross Island Interchange if the Eastbank Freeway didn't drop to four lanes between the I-84 ramps and the Fremont Stack. 
Title: Re: Longest of Anything
Post by: Bickendan on July 16, 2013, 04:25:11 AM
Province of British Columbia
Longest route designation of any kind: BC 97, 2177 km/1356 miles (includes portions in Yukon)
Longest Interstate or Continuous freeway: TCH 1-BC 3-BC 5-TCH 1/BC 5/BC 97-TCH 1/BC 97, 376 km/235 miles
Longest State Route (Unsigned): Not applicable
Longest State Route (Signed): BC 97, 2177 km/1356 miles
Longest Named Route: Yellowhead Highway (TCH 16), 1246 km/774 miles
Longest Divided Highway: ?
Longest Gap on Freeway Between Exits: BC 5, 25 km/16 miles, between exits 290 and 315.
Longest Six Lane Segment (three each direction): Unknown
Title: Re: Longest of Anything
Post by: Dr Frankenstein on July 16, 2013, 11:09:27 AM
Québec:
Longest autoroute: A-20, 558 km / 347 mi
Longest provincial highway: R-138, 1,389 km / 863 mi
Title: Re: Longest of Anything
Post by: 2Co5_14 on July 16, 2013, 12:58:07 PM
Longest continuous 6-lane (3 each direction) section of freeway: I-75 in GA and FL between I-475 & FL Turnpike - 300 miles.
Longest 15-lane section of freeway: I-75 in GA between Delk Rd. (exit 261) & Windy Hill Rd.(exit 259) - 2 miles.
Title: Re: Longest of Anything
Post by: Thing 342 on July 16, 2013, 02:04:42 PM
Virginia:

Longest Numbered Route: US 58 (507 Miles)
Longest Freeway: I-81 (324 Miles)
Longest State-Numbered Route: VA 40 (228 Miles)
Longest Continuous Multilane Highway: US 460 (407 Miles, from Chesapeake to Grundy, via WV)
Longest Exit Gap: 9 Miles on I-85 between Exit 15 for US 1 in South Hill, to Exit 24 for SR 644 in Meredithville
Title: Re: Longest of Anything
Post by: Brandon on July 16, 2013, 02:05:36 PM
State of Illinois
Longest route designation of any kind: US-51 ~413 miles
Longest Interstate or Continuous freeway: I-57 - 358 Miles
Longest State Route (Signed): IL-1 - 325 miles
Longest Divided Highway: IL-336 from US-24 in Quincy to US-136 in Macomb - 80 miles
Longest Gap on Freeway Between Exits: I-88 between IL-26 in Dixon and IL-251 in Rochelle - 22 miles
Title: Re: Longest of Anything
Post by: Alps on July 16, 2013, 10:40:17 PM
Longest thread: Alanland
Title: Re: Longest of Anything
Post by: Scott5114 on July 16, 2013, 11:05:43 PM
Longest thread: Alanland

The original Road-Related Illustrations thread has 104 more pages than the Alanland thread.
Title: Re: Longest of Anything
Post by: NE2 on July 16, 2013, 11:27:27 PM
Goatest thread: not Alanland
Title: Re: Longest of Anything
Post by: Mapmikey on July 17, 2013, 06:43:10 AM
Virginia:

Longest Numbered Route: US 58 (507 Miles)
Longest Freeway: I-81 (324 Miles)
Longest State-Numbered Route: VA 40 (228 Miles)
Longest Continuous Multilane Highway: US 460 (407 Miles, from Chesapeake to Grundy, via WV)
Longest Exit Gap: 9 Miles on I-85 between Exit 15 for US 1 in South Hill, to Exit 24 for SR 644 in Meredithville

US 460 is not continuously multilane.  In Crewe, VA it is just one lane per direction with a center turn lane.  There is also another segment like this west of VA 112 in Salem but was being widened last time I was there.  Additionally, there is a segment like this climbing Christianburg Mountain just east of I-81 exit 118.  Finally, there is a true 2-lane segment from central Salem east to nearly VA 419.

My guess is the longest continuous multilane non-interstate route in Virginia is US 58 from west of Stuart to Bowers Hill, nearly 250 miles.

Historically, the longest route in Virginia was VA 10 prior to 1933.  The 1926 Official map put its distance at 569 miles from Cumberland Gap to Virginia Beach via Roanoke, Lynchburg, and Petersburg.

The exit gap you cite is 9.24 miles per the 2012 traffic log.  I-81 between Exit 118 US 11-460 and Exit 128 SR 603 is 9.73 miles.


Mapmikey
Title: Re: Longest of Anything
Post by: pianocello on July 17, 2013, 06:14:48 PM
Iowa

Longest highway of any kind: US-30, 332 miles
Longest state highway: IA-3, 326 miles
Longest interstate: I-80, 306 miles
Longest continuous freeway (those bumps at Des Moines are definitely TOTSOs): I-80 east from Council Bluffs-235-35 north toward Mason City, 268 miles
Longest multi-state route going through Iowa: Route 92, 886 miles (274 in Iowa)
Title: Re: Longest of Anything
Post by: bulldog1979 on July 18, 2013, 05:28:24 AM
Michigan

Longest highway of any type, and longest freeway: I-75 (395 mi)
Longest US Highway: US 23 (362 mi)
Longest state trunkline: M-28 (290 mi)
Title: Re: Longest of Anything
Post by: kphoger on July 18, 2013, 12:43:22 PM
I'm curious:  What is the longest distance signed with a fraction?  (e.g. ANYTOWN  6¼ miles)
Title: Re: Longest of Anything
Post by: agentsteel53 on July 18, 2013, 12:54:29 PM
I'm curious:  What is the longest distance signed with a fraction?  (e.g. ANYTOWN  6¼ miles)

I believe there is a 10 1/2 advance sign for CA-85 (southern end) on US-101 northbound near Gilroy.  it might even be 13 1/2.  I don't recall offhand, but it is definitely double digits.
Title: Re: Longest of Anything
Post by: Billy F 1988 on July 19, 2013, 03:14:09 PM
State of Montana:

Longest state road: 200
Longest metro multi-route contingency: I-90, US 12, US 93, MT 200 - 13 miles
Longest multi-route contingency: I-90 and US 12 - 67 miles
Longest turnpike, bridge or named road: Vigilante Trail (using MT 41 and MT 287) 271 miles (it originally was 119 in 1929)
Title: Re: Longest of Anything
Post by: webfil on July 20, 2013, 10:31:38 AM
Longest provincial highway: R-138, 1,389 km / 863 mi
That is not true.

First of all, R-138 is 1519 kilometres (944 miles) long.
Also, the longest provincial highway is R-132, with its length of 1612 kilometres (1001 miles).
Title: Re: Longest of Anything
Post by: cpzilliacus on July 20, 2013, 01:04:44 PM
Quote
First of all, R-138 is 1519 kilometres (944 miles) long.
Also, the longest provincial highway is R-132, with its length of 1612 kilometres (1001 miles).

Looking on the map, it appears that Quebec 138 would be (by far) the longest if it were to be continuous all the way from Natashquan to Blanc Sablon.

Title: Re: Longest of Anything
Post by: cpzilliacus on July 20, 2013, 02:21:04 PM
Maryland

Longest Interstate highway - I-95 at about 109+ miles

Longest distance between interchanges - I-68 in Garrett County between exits 4 and 14 at about 9.65 miles (though there is a rest area/welcome center on the eastbound side) - alternatively, I-95 (JFK Highway) in Cecil County between exits 100 and 109 at about 8.72 miles has no rest area or welcome center

Longest non-Interstate highway with full access control - Md. 295 (Baltimore-Washington Parkway) at about 29.5 miles (about 18.6 miles is National Park Service maintenance, about 10.3 miles is state maintenance, and less than 1 mile is Baltimore City  maintenance)

Longest U.S. highway - U.S. 40 at 220+ miles (also the longest numbered highway, though a fair amount is multiplexed with I-68 and I-70)

Longest state highway - Md. 2 at about 79 miles

Longest bridge - U.S. 50 and U.S. 301, William Preston Lane, Jr. Memorial Bridge (a/k/a Chesapeake Bay Bridge) at about 4.06 miles (does not include causeway section on the Eastern Shore (Queen Anne's County) side)
Title: Re: Longest of Anything
Post by: webfil on July 20, 2013, 02:40:53 PM
Quote
First of all, R-138 is 1519 kilometres (944 miles) long.
Also, the longest provincial highway is R-132, with its length of 1612 kilometres (1001 miles).

Looking on the map, it appears that Quebec 138 would be (by far) the longest if it were to be continuous all the way from Natashquan to Blanc Sablon.

Indeed, as it would possibly extend its length above 1900 kilometres.
Title: Re: Longest of Anything
Post by: Urban Prairie Schooner on July 20, 2013, 08:58:38 PM
Louisiana

Longest Interstate/continuous freeway: I-10, 274.42 miles
Longest state highway: LA 1, 436.2 miles
Longest US highway: US 90, 300.63 miles
Longest bridge over open water: Lake Pontchartrain Causeway, 24 miles
Longest bridging of any sort: I-310/I-10/I-55 from Destrehan to north of Pass Manchac, 38.72 miles (for all practical purposes this is a single bridge with multiple access points)
Longest gap between freeway exits: 12 miles at two locations (I-10 between exits 139 and 151 and exits 194 and 206)
Title: Re: Longest of Anything
Post by: Dr Frankenstein on July 22, 2013, 11:20:14 AM
Yup, my bad. Don't know how I screwed that one up, especially since I knew the answer. Must've been tired or something.
Title: Re: Longest of Anything
Post by: US81 on July 22, 2013, 04:47:43 PM
I can't believe no one has posted anything as yet for Texas. I'll toss a couple out there so I can be corrected.

Longest Interstate mileage: 1-10 - 880mi (2460mi total)
Longest intrastate 2di: I-45 - 285mi
Longest US highway: US 83 - 783mi in Texas (1894mi total)
Longest intrastate highway: US 290 - 261mi
Longest state highway: TX 16 - 542mi
Title: Re: Longest of Anything
Post by: agentsteel53 on July 22, 2013, 05:31:57 PM
highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
Title: Re: Longest of Anything
Post by: Quillz on July 22, 2013, 05:36:11 PM
highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
It runs less than 700 miles through the state, so how did they get a milepost number of 987?
Title: Re: Longest of Anything
Post by: agentsteel53 on July 22, 2013, 06:43:17 PM
highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
It runs less than 700 miles through the state, so how did they get a milepost number of 987?

a similar mileposting system to Arizona.  US-89 goes up to something like 604 in Arizona.

(http://onlinemanuals.txdot.gov/txdotmanuals/trm/images/TRM_07-1.gif)
Title: Re: Longest of Anything
Post by: dgolub on July 22, 2013, 06:57:51 PM
Long Island

Longest interstate: I-495 (the only one)
Longest state route: NY 27 (122.28 miles)
Longest county route: Suffolk CR 80 (32.50 miles)
Longest road by name: Montauk Highway (includes some or all of NY 27A, CR 85, CR 80, and NY 27)

New York City

Longest street in Manhattan: Broadway (running the full length of Manhattan and then through the Bronx into Westchester for quite a distance)
Title: Re: Longest of Anything
Post by: agentsteel53 on July 22, 2013, 07:01:30 PM
Long Island

Longest interstate: I-495 (the only one)

this is getting a little too specific.

I'm gonna note that the longest interstate along the I-15 corridor is I-15.
Title: Re: Longest of Anything
Post by: english si on July 22, 2013, 07:19:08 PM
I'm curious:  What is the longest distance signed with a fraction?  (e.g. ANYTOWN  6¼ miles)
182 1/2 to London from this sign (https://maps.google.com/maps?hl=en&ll=53.404863,-2.158095&spn=0.00387,0.010568&t=m&layer=c&cbll=53.405413,-2.158797&panoid=gmDxqgZvUqduvzvRTh2rig&cbp=12,44,,2,-1.51&z=17). Also 118 1/2 to Carlisle.

The 182 1/2 is the highest mileage on a sign in the UK.
Title: Re: Longest of Anything
Post by: agentsteel53 on July 22, 2013, 07:39:00 PM
I'm curious:  What is the longest distance signed with a fraction?  (e.g. ANYTOWN  6¼ miles)
182 1/2 to London from this sign (https://maps.google.com/maps?hl=en&ll=53.404863,-2.158095&spn=0.00387,0.010568&t=m&layer=c&cbll=53.405413,-2.158797&panoid=gmDxqgZvUqduvzvRTh2rig&cbp=12,44,,2,-1.51&z=17). Also 118 1/2 to Carlisle.

The 182 1/2 is the highest mileage on a sign in the UK.

seriously?  no distance to London on a sign in, say, Newcastle?
Title: Re: Longest of Anything
Post by: NE2 on July 22, 2013, 07:47:47 PM
a similar mileposting system to Arizona.  US-89 goes up to something like 604 in Arizona.
Arizona is rather different, with many routes being mileposted as spurs of others, and mileage continuing from the split. But US 89(A) isn't even numbered strangely - it really was that many miles from Nogales.
http://www.azdot.gov/mpd/gis/maps/pdf/mps.pdf

Strangely, SR 80 (and spurs, including SR 186) seems to be numbered via SR 84 from Gila Bend to Tucson, not via US 80 and Phoenix.
Title: Re: Longest of Anything
Post by: Quillz on July 23, 2013, 01:56:49 AM
highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
It runs less than 700 miles through the state, so how did they get a milepost number of 987?

a similar mileposting system to Arizona.  US-89 goes up to something like 604 in Arizona.

(http://onlinemanuals.txdot.gov/txdotmanuals/trm/images/TRM_07-1.gif)
I've looked at this for two minutes and still don't understand it. Seems needlessly confusing to me.
Title: Re: Longest of Anything
Post by: NE2 on July 23, 2013, 02:05:53 AM
Yeah, I think I might get it but I'm not at all sure.
Title: Re: Longest of Anything
Post by: Quillz on July 23, 2013, 02:07:43 AM
It seems like east-west and south-north routes are essentially being tied to specific milepoint numbers when certain county lines are crossed. So I guess this means US-67 jumps several milepost numbers ahead. I think...
Title: Re: Longest of Anything
Post by: Bruce on July 23, 2013, 03:57:28 AM
State of Washington

Longest route designation of any kind: SR 20 - 436 miles
Longest U.S. route: US 12 - 431 miles
Longest Interstate: I-90 - 298 miles
Longest concurrency: I-82/US 12 - 71 miles

Longest auxiliary state route: SR 155 - 78 miles
Longest auxiliary U.S. route: US 395 - 275 miles
Longest auxiliary Interstate: I-405 - 30 miles

Longest collapsed/destroyed bridge: Hood Canal Bridge (SR 104) - 7,869 ft

On the other end of the spectrum...

Shortest route designation of any kind: SR 213 - 0.35 miles
Shortest U.S. route: US 197 - 3.18
Shortest Interstate: I-705 - 1.5 miles

Shortest route to cross the state line: SR 41 southbound - 0.41 miles

Shortest collapsed/destroyed bridge: I-5 Skagit River Bridge - 1,112 feet
Title: Re: Longest of Anything
Post by: wxfree on July 23, 2013, 05:46:50 AM
highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
It runs less than 700 miles through the state, so how did they get a milepost number of 987?

a similar mileposting system to Arizona.  US-89 goes up to something like 604 in Arizona.

(http://onlinemanuals.txdot.gov/txdotmanuals/trm/images/TRM_07-1.gif)
I've looked at this for two minutes and still don't understand it. Seems needlessly confusing to me.

It is somewhat complicated.  They're called reference markers, not mile markers, because they don't represent actual mileage (except when within a single county when there has been no rerouting). For US 67, measure the distance from the given latitude (the latitude of the given point) directly south to the northernmost point of the highway (where it enters the state).  Remember that the beginning point is 10, not 0(a highways starting at the state line at the north end of the Panhandle has an initial number of 10).  A marker is placed every two miles, with the number (almost always even) increasing by two.  They are generally placed on alternating sides of the highway, with one on each side every four miles (the number is displayed on both sides of the sign post and can be seen from both directions during daylight).

An additional complication is that the measurement starts again at each county line (unless the marker falls close to that line, in which case the marker will be set accurately according to mileage but not directly on the county line).  If the last marker from the north is 486, and it's one-half mile to the county line, the next marker, 488, will be directly on the county line.  This results in numbers that grow faster than mileage.

Also, once the marker is placed, it is not moved.  If a bypass is built, the original markers downstream from it are not moved, and no longer represent accurate mileage from the markers upstream from the bypass.  The markers along the bypass are not placed every two miles, but are spaced evenly to fill the gap in the numbers.  Markers along the bypass that are not spaced at 2 mile intervals have an A used as a suffix (such as 486A while the marker along the business route retains the number 486).

To see the placements and numbers of markers, go to the Statewide Planning Map, and select Markers near the bottom of the list.  Note that Interstate highways have actual mile markers accurately placed every mile, but not all of them are shown on the map.  Also, markers are not shown on the map along business routes, although in my experience they are left in place.
http://www.txdot.gov/apps/statewide_mapping/StatewidePlanningMap.html (http://www.txdot.gov/apps/statewide_mapping/StatewidePlanningMap.html)
Title: Re: Longest of Anything
Post by: agentsteel53 on July 23, 2013, 12:31:50 PM
It is somewhat complicated.

good lord.

who decided this was an advantage to have the reference posts be this cryptic?
Title: Re: Longest of Anything
Post by: agentsteel53 on July 23, 2013, 12:32:33 PM

Shortest collapsed/destroyed bridge: I-5 Skagit River Bridge - 1,112 feet

incorrect.  I once built a bridge across a small rivulet of water using two rocks and a stick.  it immediately collapsed because I didn't do a very good job of it.  it was maybe 6 inches long.
Title: Re: Longest of Anything
Post by: Rover_0 on July 23, 2013, 01:22:05 PM
highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
It runs less than 700 miles through the state, so how did they get a milepost number of 987?

a similar mileposting system to Arizona.  US-89 goes up to something like 604 in Arizona.

(http://onlinemanuals.txdot.gov/txdotmanuals/trm/images/TRM_07-1.gif)

US-89A goes up to 613 (http://goo.gl/maps/eDNz4).
Title: Re: Longest of Anything
Post by: kphoger on July 24, 2013, 12:40:09 AM
It is somewhat complicated.

good lord.

who decided this was an advantage to have the reference posts be this cryptic?

The main advantage I see:

If a bypass is built, the original markers downstream from it are not moved
Title: Re: Longest of Anything
Post by: english si on July 24, 2013, 06:35:19 AM
seriously?  no distance to London on a sign in, say, Newcastle?
No and this one is only as it is an old sign (you wouldn't go that way anyway. Plus the fractions with a distance way above the rather small recommended distance).

The furthest distance on a modern sign in the UK is the A30 leaving Exeter with London at 166 (https://maps.google.com/?ll=50.730479,-3.450866&spn=0.016434,0.042272&t=m&z=15&layer=c&cbll=50.730507,-3.450734&panoid=yShs6UWdteCFBgLlkFiSNQ&cbp=12,73.64,,0,9.05). The only other places signed with 100 miles distances in England and Wales are Harwich and Felixstowe (https://maps.google.com/?ll=52.404854,-1.17455&spn=0.015945,0.042272&t=m&z=15&layer=c&cbll=52.404683,-1.174344&panoid=jFlTHdnszcccEtsstdheLQ&cbp=12,136.51,,0,21.02). Scotland has lots as there are long distances with nothing and Dublin is signed at over 100 at various places in western Northern Ireland.

Places might be signed, but mileages aren't always given (see, for instance this one (https://maps.google.com/?ll=53.843362,-1.342134&spn=0.03084,0.084543&t=m&z=14&layer=c&cbll=53.843111,-1.342011&panoid=ujN3tgqu4Vfdup1Nh0wIeg&cbp=12,165.2,,0,10.96) which would be 200ish to London that way and 190ish the more direct route down the A1, and I'm almost certain that that is the furthest away London appears on a sign*). Maybe there's a milestone on the Great North Road in Yorkshire that gives a slightly higher figure to London than this 221 (http://www.geograph.org.uk/photo/1802509), but this the highest I can find - the London figure, however, is little more than a chainage marker, which means that we ought to include this 504.5 (https://maps.google.com/?ll=54.99341,-3.047462&spn=0.003724,0.010568&t=m&z=17&layer=c&cbll=54.993343,-3.047325&panoid=NBGjYm5M8NsknIepe3gJTQ&cbp=12,78.43,,2,10.07) marker - the highest in the land. This 504.4 (https://maps.google.com/?ll=54.992998,-3.046657&spn=0.003724,0.010568&t=m&z=17&layer=c&cbll=54.992856,-3.046397&panoid=dTwxy_hxAhyseGqOuZ6BFw&cbp=12,127.04,,0,2.6) is the highest number on a sign that isn't a road number (it is km from London via the M1).

*And only because at the next junction they want to divert you off of the busy and congested A1 section between Doncaster and Darrington, and the dire A1(M)/M18 junction, and onto the busy and congested M1 that goes the long way around via Leeds and Sheffield.

Edit: completely forgot milestones in Cornwall: London 245 (http://www.geograph.org.uk/photo/1527003).
Edit again: this 167 to London RCS on the M5 at Taunton (https://maps.google.com/?ll=50.97394,-3.171101&spn=0.032914,0.084543&t=m&z=14&layer=c&cbll=50.973949,-3.170876&panoid=Jc8BN6BsCzMbG2BmN1SbGQ&cbp=12,78.67,,0,16.9) just beats the Exeter one (despite being some way closer as the crow flies) and this sign (https://maps.google.com/?ll=50.06633,-5.714623&spn=0.002097,0.005284&t=m&z=18&layer=c&cbll=50.06626,-5.714701&panoid=ITTyrQvE-C5-k9eSIc-WWg&cbp=12,326.63,,2,1.71), which is better than its opposite (http://www.geograph.org.uk/photo/931325)!
Title: Re: Longest of Anything
Post by: agentsteel53 on July 24, 2013, 12:47:49 PM
awesome stuff; thank you for hunting all those down!
Title: Re: Longest of Anything
Post by: Perfxion on July 24, 2013, 02:18:57 PM
Long Island

Longest interstate: I-495 (the only one)

I-495 might be the longest, but 278, 678, and 295 are all in Long Island as well. Kings and Queens County do count since they are on the island.
Title: Re: Longest of Anything
Post by: Kacie Jane on July 24, 2013, 02:44:22 PM

Shortest collapsed/destroyed bridge: I-5 Skagit River Bridge - 1,112 feet

incorrect.  I once built a bridge across a small rivulet of water using two rocks and a stick.  it immediately collapsed because I didn't do a very good job of it.  it was maybe 6 inches long.
Ah, but Jake, was your stick bridge in the state of Washington?

In all seriousness, 1,112 feet is the length of the entire bridge. Only a single span measuring 160 feet collapsed. But I'd bet you could find a still smaller bridge that has been abandoned to collapse (my hunch says on the Olympic Peninsula, but don't ask me why). Perhaps not on the state highway system though?
Title: Re: Longest of Anything
Post by: kphoger on July 24, 2013, 05:27:17 PM

Shortest collapsed/destroyed bridge: I-5 Skagit River Bridge - 1,112 feet

incorrect.  I once built a bridge across a small rivulet of water using two rocks and a stick.  it immediately collapsed because I didn't do a very good job of it.  it was maybe 6 inches long.
Ah, but Jake, was your stick bridge in the state of Washington?

In all seriousness, 1,112 feet is the length of the entire bridge. Only a single span measuring 160 feet collapsed. But I'd bet you could find a still smaller bridge that has been abandoned to collapse (my hunch says on the Olympic Peninsula, but don't ask me why). Perhaps not on the state highway system though?

Or, in other words:   I did not research any other bridge collapses before posting.   :bigass:
Title: Re: Longest of Anything
Post by: wxfree on July 24, 2013, 06:37:26 PM
Here are some categories that interest me:
Longest stretch of highway across a single county: in Texas, I-10 across Pecos County, 100 miles
Longest highway entirely in one county: in Texas, SH 54 in Culberson County, 55 miles
Longest stretch of highway between two consecutive highway intersections: in Texas, SH 118 between US 67/90 and FM 170, 78 miles
Longest stretch of Interstate between two consecutive Interstate intersections (in one state): in Texas, I-20 between I-10 and I-30, 421 miles
Longest stretch of Interstate between two consecutive Interstate intersections regardless of state lines: Anyone?
Title: Re: Longest of Anything
Post by: Quillz on July 24, 2013, 07:53:25 PM
For the latter, there is almost 500 miles between I-5's junctions with I-80 (Sacramento) and I-84 (Portland). But if you include auxiliary connections, then it's much less, as there is a (one-way) connection with I-505, I-105 in Eugene and I-205 in Portland.
Title: Re: Longest of Anything
Post by: agentsteel53 on July 24, 2013, 08:09:58 PM

Ah, but Jake, was your stick bridge in the state of Washington?

actually, yes.  in Bellingham down by the beach. 
Title: Re: Longest of Anything
Post by: getemngo on July 24, 2013, 08:53:31 PM
Longest stretch of Interstate between two consecutive Interstate intersections regardless of state lines: Anyone?

Hmm... I believe it's I-80 between I-580 in Reno and I-215 in Salt Lake City. 512 miles. That's what the very outdated Roadfan FAQ (http://roadfan.com/mtrfaq.html#a6101) says. Runner-up would probably be I-70 between I-15 in Utah and I-76 in Denver, 501 miles.

But if we're only counting signed Interstates, I-94 has 597 miles between I-90 in Billings and I-29 in Fargo (ignoring unsigned I-194 in Bismarck).

If we were only counting 2dis, I-80 would win, because it's 646 miles between I-5 in Sacramento and I-15 in SLC. That's more than Quillz's guess, which is "only" 575 miles.
Title: Re: Longest of Anything
Post by: roadman65 on July 26, 2013, 09:03:25 AM
I believe that I-70 in Utah holds the record on an interstate with 108 miles of interchanges with no Services at interchanges on the interstate system.

US 77 in Kenedy County, Texas may not be the longest stretch of highway (non freeway) within a single county without a stop light or any kind of services, but it is sort of a longest in a sense.  How much do you find a single county that has one main road, no major cities, a very small population, and no businesses and very primitive.  When I-69E (oh I hate that designation) gets completed, the county's only major route of transit will be an interstate with no other non freeways as main roads.
Title: Re: Longest of Anything
Post by: wxfree on July 26, 2013, 07:57:43 PM
I believe that I-70 in Utah holds the record on an interstate with 108 miles of interchanges with no Services at interchanges on the interstate system.

US 77 in Kenedy County, Texas may not be the longest stretch of highway (non freeway) within a single county without a stop light or any kind of services, but it is sort of a longest in a sense.  How much do you find a single county that has one main road, no major cities, a very small population, and no businesses and very primitive.  When I-69E (oh I hate that designation) gets completed, the county's only major route of transit will be an interstate with no other non freeways as main roads.

I agree about US 77 in Kenedy County.  I've never been there, but that's a stretch of road I want to drive some day.  I like desolate areas and have seen a lot in west Texas.  Such a long stretch of road without any public through road intersections is intriguing to me.  I remember some years back a hurricane hit Kenedy County and caused very little damage because there was nothing there to damage.  I remember it being reported that this storm hit the least developed county on the entire Atlantic basin coast.