Longest stretch of 6 lanning, 8 lanning, 10 lanning

[kendancy66]

I-5 is at least 6 lanes from the Mexico Border through the CA-99 split, which is about 210 miles.

And (I'm pretty sure) the only sections that are only 6 lanes is between CA-91 and I-605, so once that upgrade is (finally) complete it would be at least 8 lanes for that entire length.

It could be argued that the spaghetti that forms the East LA interchange constitutes 6 or more lanes going north and south but:

There is a short section (up to a mile or so) that I-5 only 2 lanes going North from where Golden State freeway starts at I-10 West split to where ramp from CA-60 West to I-5 North merges and forms a third lane there, At Seventh St exit, it again narrows to 2 north bound lanes, for a short distance until I-10 East merges in from the left.

Conversely, traveling on I-5 South there is only 2 lanes after CA-60 East departs on the left until a ramp from 60 East merges in from the left forming 4 southbound lanes just before US-101 South forms 2 more lanes

[longhorn]

Some others:

IH-10 has 6+ from the CA-86S expressway in Indio all the way to its terminus, and 8+ from Yucaipa to the 405, though it may narrow to 2 through lanes temporarily at one of the downtown L.A. interchanges.  IH-15 is also 6+ from its terminus to IH-40 in Barstow, a whopping 185 miles.

IH-45 will soon have 8+ continuously from League Line Road in Conroe to at least NASA Road 1 (66 miles - though not sure where the 8-laning ends now, exactly), and 6+ from the Walker/Montgomery County Line to its terminus in Galveston (approx. 102 miles), once construction is complete from Conroe northward.  If you count IH-45 and US-75 as a single highway, it has 6+ continuously from the north end of the Corsicana bypass to TX-121 south of McKinney, for a total of 79 miles. 

IH-35 is also 6+ continuously from Exit 280 in Bell County to IH-410 south of San Antonio, or 135 miles, if you count the "express" and "local" lanes in Austin as 4 combined lanes in each direction.  Expansion is currently in progress to Belton, so counting the 6-lane segment south of Temple, you'll have a total of 151 miles of 6-laned freeway for your driving pleasure.  Or not, considering how awful traffic is on 35 through Austin.

Eventually I-35  will be three lanes per side from Hillsboro (though the masterplan has I-35E from Dallas three lanes)to San Antonio.

And when completed it will be I-10 from Houston to Lake Charles Louisiana.

[kkt]

I-5 is 6 lanes from Vancouver, WA, to Exit 55.  Eventually, it will be 6 lanes from Portland to Seattle.

It is 6 lanes from exit 88 to exit 224 (136 miles)  on I-5 in Western Washington.  Currently WSDOT is widening I-5 between Chehalis and Grand Mound (exit 88).  Eventually I-5 will be at least 6 lanes through the entire state.

Glad to hear they plan to make the whole stretch from Chehalis to Grand Mound six lanes.  It takes almost nothing for traffic to get backed up to stop and go through that stretch there now.  (Rain, summer weekend, 3-day weekend, spring break, Christmas break, ...)

Do they have actual plans to widen I-5 north of exit 224 (Mt. Vernon)?  I'd like to see it six lanes at least until it heads into the mountains north of Burlington.  North of there, I'm not sure it's needed.

[longhorn]

Resurrecting this interesting thread.

In NC, the I-40/I-85 from Greensboro to Durham is 8 lanes.

[jeffandnicole]

Since the thread has been brought back to life, and while it was referenced 4 years ago or so, the widening wasn't completed.  So...

It's a minimum of 12 lanes on the NJ Turnpike for about 57 miles, from south of Interchange 6 to around Interchange 14.  Include the east & west spurs north of Interchange 14, and it's at least 12 lanes wide for nearly 70 miles. 

It's a minimum of 10 lanes from just before Exit 6 on the NJ Turnpike to just beyond the GWB, about 75 miles in length.  A small stretch of 95 between I-80 & the bridge is why it's not at least 12 lanes for all 75 miles.

[PHLBOS]

Since this thread's been bumped, some updates/corrections to NE2's I-95 listings

I-95 has the following minimum lane count north of North Carolina:
...
*6, I-495 to I-476

except 4 through I-476 interchange

*6, PHL to Girard Avenue

It's 8 lanes between I-76 (Walt Whitman Bridge) and Columbus Blvd. (Penns Landing)

Restarting along I-295 in Delaware to the NJ Turnpike:
...
*6, NJ 73 to split south of NJ 32 (being widened north of PA Turnpike) about 1-1/2 miles south of the PA Turnpike split
*12, NJ 18 approx. 1-1/2 miles south of the PA Turnpike split to GSP

Above updated to reflect completion of the NJ Turnpike widening.

...
*6, I-195 to MA 9, except 3 (1 northbound) through I-93 interchange

At present, the current I-95 widening (to 8 lanes) project is completed from I-93/Canton to Great Plain Ave.  When fully completed, I-95 will be 8 lanes between both I-93 interchanges (Canton & Woburn/Reading); though it briefly drops to 6 lanes (restriped only, no reduction in pavement) through the I-90/Mass Pike interchange.

...
*8, US 1 connection to MA 133 113
*6, MA 133 113 to I-495

This is one case where an honest typo can make a difference. 

The new Whittier Bridge, when completed, will make I-95 8 lanes from US 1/Exit 46 to MA 110.

[freebrickproductions]

I-565 is 10 lanes between Jordan Lane and Bob Wallace Avenue here in Huntsville, AL. It ain't a very long stretch though.

[bzakharin]

Since I spend most of my time in NJ, I have always thought that 6+ lanes was the rule rather than the exception. All of NJ's interstates except I-195 are majority 6+ lanes. Also, the Turnpike, Parkway, the 42 Freeway, and AC Expressway are entirely or majority 6+ lanes. Only most state and US route freeways are less than 6 lanes throughout (NJ 55, NJ 24, NJ 18, etc)

[jeffandnicole]

Since I spend most of my time in NJ, I have always thought that 6+ lanes was the rule rather than the exception. All of NJ's interstates except I-195 are majority 6+ lanes. Also, the Turnpike, Parkway, the 42 Freeway, and AC Expressway are entirely or majority 6+ lanes. Only most state and US route freeways are less than 6 lanes throughout (NJ 55, NJ 24, NJ 18, etc)

With the completed widening, ironically the NJ turnpike has less 6 lane mileage (14 miles on the mainline, 5 miles on the PA/NJ Extension, than it does 4 lane mileage (35 miles on the mainline, a little more on the Exit 14 Extension)

I-295 is also 4 lanes from Exit 1 to Exit 13, as well as I-78 east of the NJ Turnpike mainline.

[jbnati27]

Kentucky is really progressing well with widening I-65 and I-75 throughout the state.  I think I-75 is now six lanes from London (possibly Corbin) all the way to the Ohio River (and let's not forget OH's progress on 75 north of Dayton).

I-75 narrows to four lanes North of London until you get North of Mt. Vernon. Then, at that point, it's 6 lanes all the way to the Ohio River (unless you discount the I-64/I-75 interchange North of Lexington). That's approximately a 120 mile stretch of at least a six lane highway. Then, in Ohio, it's at least 6 lanes all the way (at least it's supposed to be in downtown Dayton if the construction ever is finished) up North of Dayton to at least around Troy (MM 73/74).  That's about 200 miles of at least 6 lanes.

[bzakharin]

Since I spend most of my time in NJ, I have always thought that 6+ lanes was the rule rather than the exception. All of NJ's interstates except I-195 are majority 6+ lanes. Also, the Turnpike, Parkway, the 42 Freeway, and AC Expressway are entirely or majority 6+ lanes. Only most state and US route freeways are less than 6 lanes throughout (NJ 55, NJ 24, NJ 18, etc)

With the completed widening, ironically the NJ turnpike has less 6 lane mileage (14 miles on the mainline, 5 miles on the PA/NJ Extension, than it does 4 lane mileage (35 miles on the mainline, a little more on the Exit 14 Extension)

I-295 is also 4 lanes from Exit 1 to Exit 13, as well as I-78 east of the NJ Turnpike mainline.

That's why I said *majority* 6+ lanes. NJ Turnpike actually has a brief section of 16 lanes where the car/truck lanes transition to Eastern/Western spur.

[cl94]

Since this thread was bumped and I don't know if anyone mentioned it, I-71 in Ohio. 6+ lanes from I-270 south of Columbus to the northern terminus at I-90. ~145 miles excluding stretches through a few interchanges. Eventual plan is to 6 lane the entire thing, totaling ~245 miles with only a couple interruptions.

The Ohio Turnpike from Toledo to Youngstown is 6 lanes for 154 miles. I think the plan is to eventually 6 lane it west of Toledo.

If NYSTA ever gets smart and widens the Thruway between Exits 16 and 23 like is probably needed, I-87 would be 6+ lanes for 200 miles.

[vtk]

Since this thread was bumped and I don't know if anyone mentioned it, I-71 in Ohio. 6+ lanes from I-270 south of Columbus to the northern terminus at I-90. ~145 miles excluding stretches through a few interchanges.

The excluded stretch of one lane each way at the Mound-Sandusky interchange in Columbus is notable.

I-270 is at least six lanes all the way around, except where it's 4 lanes inside the interchages with the South and West Freeways. It maxes out at 12 lanes, unless you count the Morse Rd entrance ramp tapers in the Easton area, then you'd get a max of like 15. Anyway, I-270 may  be only 55 miles, but it's a continuous circuit so you can just keep going forever, so it's almost like an infinite 6-lane highway...

(Pretty sure I mentioned this in the thread's previous life, but 270 still had a non-excludable 4-lane section then...)

[cl94]

If they ever rebuild Mound-Sandusky, it'll finally be 2 lanes. Granted, it used to be worse (I-71 SB had a loop ramp in the first iteration of that interchange).

As far as 8+ lanes, how much of I-5 is 8+ south of SR 99? That has to be quite a bit.
New York's longest stretch of 8+ is about 40 miles on the LIE and nothing else comes close.

Up in Ontario, the QEW is 6+ for quite a distance as well (everything north/west of Niagara Falls). Certainly doesn't come close to 401, but notable in its own right.

[vtk]

If they ever rebuild Mound-Sandusky, it'll finally be 2 lanes. Granted, it used to be worse (I-71 SB had a loop ramp in the first iteration of that interchange).

How long did that ramp carry I-71 SB mainline? Didn't the mainline originally follow the North and West legs of the Innerbelt?

[cl94]

If they ever rebuild Mound-Sandusky, it'll finally be 2 lanes. Granted, it used to be worse (I-71 SB had a loop ramp in the first iteration of that interchange).

How long did that ramp carry I-71 SB mainline? Didn't the mainline originally follow the North and West legs of the Innerbelt?

No clue. Maps aren't clear. I've seen some maps showing that the entire Innerbelt was I-71 at one point. However it was, the original Mound-Sandusky interchange was in place for over 10 years. The original Spring-Sandusky interchange had a RIRO that wasn't taken out until some point after 1971, meaning that area did not meet Interstate standards.

[geoffNOLA]

I-10 is at least 6 lanes wide from Winnie (SH 73) to Brookshire (FM 359) with the exception of the I-10/I-45 interchange in Houston
94 miles

[Bigmikelakers]

What about I-210/CA-210? Runs at least 6 lanes from Sylmar to Redlands which is 84 miles. I'm aware of the 134/710 interchange in Pasadena where it goes down to 2 lanes in the transition lanes so that alone probably won't make it count.

I'm pretty sure CA-60 runs at least 6 lanes from Downtown LA to Moreno Valley before it drops to 4 in the Badlands. That's almost 70 miles.

[authenticroadgeek]

For 10 lanning, probably Katy Highway But the longest (and only) one here is in Utah County where the road is 12 lanes, 14 if you count HOV lanes.

[cbeach40]

Up in Ontario, the QEW is 6+ for quite a distance as well (everything north/west of Niagara Falls). Certainly doesn't come close to 401, but notable in its own right.

QEw is 6 lanes between Mountain Road and Burlington, then a short 4 lane portion through Freeman, then 6 or more again into Toronto.

[vtk]

Is "lanning" the accepted spelling now?

I mean, I'm not sure it's even a word, but the fairly reliable wetware neural network for spelling I've built up, in my decades speaking, reading, and writing US English, is confident it should be spelled "laning".

[hotdogPi]

Is "lanning" the accepted spelling now?

I mean, I'm not sure it's even a word, but the fairly reliable wetware neural network for spelling I've built up, in my decades speaking, reading, and writing US English, is confident it should be spelled "laning".

It's like the "'Stangest' traffic lights" thread: everyone's doing it intentionally on this thread, and this thread only.

[Marc]

When finished, I-35 will be six lanes from San Antonio to the E/W split in Hillsboro. A distance of roughly 215 miles.

[mgk920]

When WisDOT gets done with their current upgrade project between Madison and the Illinois state line, I-90 will be at least six lanes from the Chicago Skyway to the I-39 northwest split (Cascade interchange) near Portage, WI.

Mike

[SSOWorld]

When WisDOT gets done with their current upgrade project between Madison and the Illinois state line, I-90 will be at least six lanes from the Chicago Skyway to the I-39 northwest split (Cascade interchange) near Portage, WI.

Mike

along those lines - I-94 will be 8-lanes+ from the Mitchell Interchange (I-894) all the way to the Edens spur. All of the Tri-State Tollway is 4 lanes+.  Note that ISHTA finished the brief 6-lane portion near the US-41 split once WISDoT put in their portion.