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Author Topic: Longest of Anything  (Read 16541 times)

webfil

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Re: Longest of Anything
« Reply #25 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).
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cpzilliacus

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Re: Longest of Anything
« Reply #26 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.

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Re: Longest of Anything
« Reply #27 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)
« Last Edit: July 20, 2013, 10:23:38 PM by cpzilliacus »
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webfil

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Re: Longest of Anything
« Reply #28 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.
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Urban Prairie Schooner

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Re: Longest of Anything
« Reply #29 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)
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Re: Longest of Anything
« Reply #30 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.
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US81

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Re: Longest of Anything
« Reply #31 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
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agentsteel53

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Re: Longest of Anything
« Reply #32 on: July 22, 2013, 05:31:57 PM »

highest milepost in Texas: US-67 in Presidio has, IIRC, 987. 
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Re: Longest of Anything
« Reply #33 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?
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Re: Longest of Anything
« Reply #34 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.

« Last Edit: July 22, 2013, 06:46:33 PM by agentsteel53 »
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Re: Longest of Anything
« Reply #35 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)
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agentsteel53

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Re: Longest of Anything
« Reply #36 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.
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Re: Longest of Anything
« Reply #37 on: July 22, 2013, 07:19:08 PM »

I'm curious:  What is the longest distance signed with a fraction?  (e.g. ANYTOWN  6 miles)
182 1/2 to London from this sign. Also 118 1/2 to Carlisle.

The 182 1/2 is the highest mileage on a sign in the UK.
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agentsteel53

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Re: Longest of Anything
« Reply #38 on: July 22, 2013, 07:39:00 PM »

I'm curious:  What is the longest distance signed with a fraction?  (e.g. ANYTOWN  6 miles)
182 1/2 to London from this sign. 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?
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NE2

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Re: Longest of Anything
« Reply #39 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.

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Re: Longest of Anything
« Reply #40 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.


I've looked at this for two minutes and still don't understand it. Seems needlessly confusing to me.
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Re: Longest of Anything
« Reply #41 on: July 23, 2013, 02:05:53 AM »

Yeah, I think I might get it but I'm not at all sure.

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Re: Longest of Anything
« Reply #42 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...
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Re: Longest of Anything
« Reply #43 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

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Re: Longest of Anything
« Reply #44 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.


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
« Last Edit: July 23, 2013, 05:51:04 AM by wxfree »
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Re: Longest of Anything
« Reply #45 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?
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Re: Longest of Anything
« Reply #46 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.
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Re: Longest of Anything
« Reply #47 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.



US-89A goes up to 613.
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Re: Longest of Anything
« Reply #48 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
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Re: Longest of Anything
« Reply #49 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. The only other places signed with 100 miles distances in England and Wales are Harwich and Felixstowe. 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 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, 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 marker - the highest in the land. This 504.4 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.
Edit again: this 167 to London RCS on the M5 at Taunton just beats the Exeter one (despite being some way closer as the crow flies) and this sign, which is better than its opposite!
« Last Edit: July 24, 2013, 07:12:13 AM by english si »
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