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What is the widest road in the world? (road / avenue / street / highway)

Searching online it's quite difficult to find something approaching an accurate answer. What I could find mentioned:

Monumental Axis, Brazil

Apparently this has, or had, a Guinness world record at some point. Though I didn't find details, and there are lots of apparently mislabelled photos marked as being this road. It's listed as being 250ft or 250m wide.

Katy Freeway, Houston, Texas

Apparently there was some trolling / misinformation from a few months ago. So you can find a few places, and fake images, saying this is the widest.

G4 Beijing-Hong Kong-Macao Expressway

The images online I can find of this look less like a road or highway, and more like a waiting area through toll booths. Also many posts saying it has "50 lanes" when there are only at most 25 toll booths.

I-35 (expansion), Houston, Texas

Apparently this may expand to ~22 lanes. Which I only mention because 22 lanes is larger than many photos of above roads.

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    I’m voting to close this question because it's a trivia question rather than about travel
    – Midavalo
    Feb 5 at 17:51
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    Widest in metres or in lanes? Feb 5 at 18:42
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    @Midavalo, trivia questions are and have been accepted on Travel Stack Exchange, so that is no reason to close the question.
    – Willeke
    Feb 5 at 19:14
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    @Tor-EinarJarnbjo In that case, La Rumorosa (Carretera Federal 2D) between Tecate and Mexicali, Baja California, has a mountain between the Eastbound and Westbound lanes, making it around 4.5km at its widest 😉
    – Midavalo
    Feb 5 at 19:33
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    Note that Beijing - Macao/ Hong Kong is several 1000 km. This highway may have lots of lanes and even more toll booths at some points but without a presice location this is useless. My guess for the most lanes stretch would be the end point Hong Kong - Shenzen - Guangzhou.
    – quarague
    Feb 6 at 8:06

3 Answers 3

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If counting lanes, then Yaza Htarni Road in Naypyidaw (the new capital of Myanmar) has up to 20 lanes (2 x 10), here with barely any separation (other sections have a larger median):

enter image description here

https://maps.app.goo.gl/Nv1G83P3AXS5HjxE9

enter image description here

A much longer part of the road has 2 x 8 lanes. In total over 11 km have at least 2 x 8 lanes.

Traffic is extremely low, though, and clearly does not justify such a wide road.

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    Seems to be about a 83m wide using the Google Maps ruler: i.sstatic.net/ryGtP.jpg
    – muru
    Feb 6 at 7:28
  • That was the exact thing that sprang to my mind first as well – old Top Gear episodes do have some use, it seems! Feb 6 at 9:49
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Avenida 9 de Julio in Buenos Aires is recognized by Guinness as the widest avenue in the world.

Arial photo of Avenida 9 de Julio

Occupying an entire city block, it's roughly 125m / 410ft from sidewalk to sidewalk.

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If you simply search for 'G4 Beijing-Hong Kong-Macao Expressway' you find pictures such as this which shows a 20 lane each way highway claiming to be the G4 without any more specific location.

However, if you just look at the wikipedia article of the G4, there are a bunch of pictures and none of them has more than 3 or 4 lanes per direction. So the G4 certainly does not look like the first picture the entire way although there may be a stretch of it somewhere that does.

Thanks to user jcaron who linked this question on skeptics which concerns exactly the same claim. There at least used to be a toll booth on the G4 highway with around 20 lanes per direction. Here is a google maps view of the spot. It is in suburbs of Beijing and it looks like the gigantic toll booth doesn't exist anymore. There is still the massive area covered in asphalt but otherwise this seems to be just a regular 4-lane per direction highway.

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    Peak lane numbers near large urban areas where they roads are full of local traffic being much higher than the more rural intercity parts is fairly common. Feb 6 at 8:59
  • The image of the G4 highway you are linking to is clearly a fake and composed by replicating a group of lanes multiple times. Feb 6 at 12:01
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    @Tor-EinarJarnbjo I wondered myself but I don't see any evidence of that, I don't see repetition of the vehicles.
    – jcaron
    Feb 6 at 12:05
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    Clearly the G4 has some toll plazas with dozens of lanes (see skeptics.stackexchange.com/a/37473/30616 but that one is definitely not the same place as the linked picture). The majority of the highway is 2 x 4 though.
    – jcaron
    Feb 6 at 12:46
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    @jcaron Multiple images taken at different times have been merged, so that the cars don't repeat, but the ground obviously does. In the left section, there is a distinct pattern of darker tarmac, which is repeating. On the right side, there is one lane separator with a distinct offset, which is repeating where you can also see, that there is a darker section of the tarmac directly right of it: media.jarnbjo.de/defb54e2-b350-4808-b49f-14cd18acb160.jpg Feb 6 at 16:37

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