Widest freeway you've been on

[Kulerage]

Probably been on a 12 lane somewhere.

[RobbieL2415]

I recently drove on the GSP and the Driscoll Bridge, which is 15 lanes.  The Viesser/Edison Bridge sits just east of it and is 6 lanes wide.  Which means there's 21 lanes of bridge crossing the Raritan River!

[thspfc]

TX-121 between the DFW airport and the split with TX-114 in Grapevine is my new longest. Very impressive stretch of freeway.

[MATraveler128]

It would be the Garden State Parkway across the Raritan River for me, followed by the New Jersey Turnpike and I-95 in South Florida.

[SkyPesos]

For me, ON 401

[Bruce]

Going by the FHWA list, my winner is I-5 in Downtown Seattle, which it counts as 13 lanes.

However, there are sections in downtown that are 14 lanes wide if you count the ramps and express lanes, such as immediately north of the Mercer Street interchange.

[jlam]

Probably the Dulles Access/Toll road. +/- 12 lanes.
https://www.google.com/maps/@38.9323692,-77.2599175,3a,75y,94.25h,88.24t/data=!3m6!1e1!3m4!1sKUIs55VitfR3Myq_VjFy6A!2e0!7i16384!8i8192

[Great Lakes Roads]

The 401 in Toronto.

[chrisdiaz]

The widest that I've been a passenger in a car on: Atlanta Downtown Connector

The widest that I've personally driven a car on: I-77 just north of Uptown Charlotte, with 12 lanes in total

[ran4sh]

Based on what others in the thread have claimed for lane counts of certain freeways, my answer would be the 27-lane section of I-395 in VA.

The MTR faq, which could be out of date, mentions several freeways of at least 14 lanes; the ones that I have been on are:

I-75 north of I-285 in Georgia (15 lanes until 2018, 17 lanes since then)
New Jersey Turnpike dual-dual section
George Washington Bridge
I-10 in the Phoenix area
I-5 in California between I-210 and route 14
California route 134 at I-210

[Ted$8roadFan]

401 in Toronto
New Jersey Turnpike in Central/Northern NJ.

[Rothman]

The Katy Freeway (I-10).

SAMSUNG-SM-G930A

Picked up ON 401 this weekend (the big section by Pearson), so another wide one under my belt (along with GSP and NJTP...).

[webny99]

For roads that only have two carriageways, this section of the Garden State Parkway is hard to top (I haven't been on it myself, though).

[Vocalicacorn187]

401 in Toronto
New Jersey Turnpike in Central/Northern NJ.

Those are both the widest I've been on as well. I honestly was not expecting I-95 and NJTP to be as busy as it was when I drove through, though that was on Thanksgiving Sunday 2019, and that may have added to it.

The 401 near Pearson is busy but not often congested.

[andrepoiy]

My widest would also be Highway 401, the widest section which is right south of the Airport.

18 lanes (4-5-4-5)

https://www.google.com/maps/@43.6642971,-79.6032832,199m/data=!3m1!1e3

[InterstateFan621]

The widest freeway I have been on is the downtown connector in Atlanta (75/85)

I think it has like 5 lanes, and it is pretty hard to drive on.

[StogieGuy7]

Probably the Autopista Panamericana in Buenos Aires, Argentina. It's 18 lanes wide for several miles, with some merge and exit lanes that bring the total up to 20-22 in some areas. They also had variable speed limits dependent upon lane, which is brilliant IMHO.

After that, I'd say either the 401 in the Toronto area (with all the express and feeder lanes) or the 5 and/or 405 through the Southland. Hard to tell which spot is the very widest of those, but I've driven the entirety of both through the LA Area.

[jeffandnicole]

401 in Toronto
New Jersey Turnpike in Central/Northern NJ.

Those are both the widest I've been on as well. I honestly was not expecting I-95 and NJTP to be as busy as it was when I drove through, though that was on Thanksgiving Sunday 2019, and that may have added to it.

The 401 near Pearson is busy but not often congested.

Overall, Thanksgiving Sunday is *the* busiest travel day of the year, and that holds true on the NJ Turnpike as well.

[3467]

I have been on Dan Ryan ,401,NJ. Turnpike ,395 VS and the Katy though not all after their most recent widenings.

[akotchi]

Probably the Autopista Panamericana in Buenos Aires, Argentina. It's 18 lanes wide for several miles, with some merge and exit lanes that bring the total up to 20-22 in some areas. They also had variable speed limits dependent upon lane, which is brilliant IMHO.

After that, I'd say either the 401 in the Toronto area (with all the express and feeder lanes) or the 5 and/or 405 through the Southland. Hard to tell which spot is the very widest of those, but I've driven the entirety of both through the LA Area.

I was on the section of the Autopista Panamericana back in the mid-1990s, and I recall a short stretch having 9 lanes in one carriageway -- don't remember the direction.  I was there on business, so I was payng attention to the lack of traffic on the main highway (toll road) and "colectora" (highway CD road, or similar) and the heavier traffic on the "frentista" (local frontage roads) to avoid the tolls.  Wonder if the patterns are still that way, 25+ years later.

To stay on topic, my widest freeways traveled are the NJ Turnpike section north of Int. 14, Parkway over Driscoll Bridge, Dan Ryan in Chicago and the I-75/85 Downtown Connector in Atlanta.

[StogieGuy7]

I was on the section of the Autopista Panamericana back in the mid-1990s, and I recall a short stretch having 9 lanes in one carriageway -- don't remember the direction.  I was there on business, so I was payng attention to the lack of traffic on the main highway (toll road) and "colectora" (highway CD road, or similar) and the heavier traffic on the "frentista" (local frontage roads) to avoid the tolls.  Wonder if the patterns are still that way, 25+ years later.

To stay on topic, my widest freeways traveled are the NJ Turnpike section north of Int. 14, Parkway over Driscoll Bridge, Dan Ryan in Chicago and the I-75/85 Downtown Connector in Atlanta.

I was on it about 10 years after you and it was as I described then.  Because it's been a while, I looked at Google Maps and it appears to be about the same now as what I drove back in 2006 or so. At the time, I was impressed but not surprised as it's the only freeway to feed the wealthier northern suburban areas - and BA is known for it's wide (surface) boulevards, Avenida 9 de Julio is 14 lanes wide (7 each direction).

[CoreySamson]

Katy Freeway for me. 26 lanes including feeders if I'm counting properly.

[Flint1979]

Ontario 401 and the Dan Ryan/Kennedy Expressway's in Chicago.

[achilles765]

Used to everyday: Katy Freeway... up to 26 at times between IH 610 and Beltway 8..used to drive that everyday.

[zachary_amaryllis]

locally, i-70 where 76 peels off, i think thats 8 or 9 lanes, so hardly interesting..

when i was a kid, i've been through the parts of the njtp and garden state parkway mentioned upthread.