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Old September 22nd, 2017, 03:36 PM   #1
Negjana
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Longest perfectly straight roads and motorways

Originating in this thread, a discussion arose over the longest perfectly straight motorway sections in the world.

I will try to keep this list as up-to-date as possible!

Austria
A9, 5.75km Map
Belgium
A10, 9.68km Map
Croatia
A4, 9.13km Map
France
A64, 12.50km Map
Germany
A1, 10.3km Map
Italy
A9, 17.5km Map
Netherlands
A6, 12.7km Map
Spain
A-31, 13.26km Map
United States
I-80, 48.57km Map
Feel free to add other countries! Only countries with a motorway straight longer than 5 kilometers will be added!

Last edited by Negjana; September 24th, 2017 at 11:00 PM.
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Old September 22nd, 2017, 03:42 PM   #2
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There is a 21.5 km straight on the A7 Afsluitdijk: https://goo.gl/maps/EGYWc3pGNdF2
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Old September 22nd, 2017, 03:46 PM   #3
Negjana
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It isn't perfectly straight through the rest area in the middle of the dam.
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Old September 22nd, 2017, 04:06 PM   #4
cairnstony2
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Australia.

A section of the Eyre Highway is straight for 145.6 kms (90.5 miles).

I think the US beats that though.
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Old September 22nd, 2017, 04:46 PM   #5
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Saudi Arabia: 231 kilometers.

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Old September 22nd, 2017, 05:06 PM   #6
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That's a Saudi route marker? Looks like Ohio or Georgia (not the actual shape, of course, but using the shape of the geographical entity). Much more interesting than little color-coded rectangles.
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Old September 22nd, 2017, 05:07 PM   #7
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Being a dead straight East-West road I bet it actually curves at some point due to spheroid geometrics .

I've measured the longest straights in my home region of Aragon (and not on Google Maps, but in situ with my car ). These are as follows:
A-127 between Ejea de los Caballeros and Sadaba: 17.8 km (used to be longer before Ejea was bypassed).
A-222 between Mediana de Aragon and Belchite: 16.3 km (technically only Southbound, as Northbound an intersection about halfway forces one to move sightly the steering wheel)
A-220 between La Almunia de Doņa Godina and Cariņena: 14,7 km.

However the Spanish straight champions are in Castile La Mancha. There are the following (This time they are measured with Google Maps):
N-301 between El Provencio and Minaya: 23 km
N-322 between Balazote and Albacete: 19.1 km (used to be 2.2 km longer before Albacete was bypassed)

Edit: The Saudi purpoted straight doesn't count, it deviates from the perfect straight by as much as 200 meters at some points.
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Old September 22nd, 2017, 05:10 PM   #8
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Quote:
Originally Posted by Negjana View Post
Originating in this thread, a discussion arose over the longest perfectly straight motorway sections in the world.

I will try to keep this list as up-to-date as possible!

Austria
A9, 5.75km Map
Belgium
A10, 9.68km Map
France
A64, 12.50km Map
Germany
A1, 10.3km Map
Italy
A9, 17.5km Map
Netherlands
A6, 12.7km Map
Feel free to add other countries!
What about the French A34?
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Old September 22nd, 2017, 05:11 PM   #9
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Lets stick with motorways for now, I will add "normal" roads later!
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Old September 22nd, 2017, 05:14 PM   #10
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The longest straight stretches I've found on Spanish motorways:

A-2 (13.8 km): https://www.google.es/maps/dir/40.75...9187339,13.46z

A-31 (13.3 km): https://www.google.es/maps/dir/39.19...-2.0961558,13z

A-6 (13.1 km): https://www.google.es/maps/dir/41.76...-5.3883106,12z

Edit: Despite the fact that it seems to be perfectly straight on the map, now that I've checked Street View the first one actually is slightly curved.

Edit 2: Same with the third one.

Last edited by Highway89; September 22nd, 2017 at 05:19 PM.
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Old September 22nd, 2017, 05:20 PM   #11
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Yup, the A-2 has a slight curve in Trijueque. It has been long refuted in Spanish forums. Nowadays such long straights are impossible to be built, as the norm mandates to build a sucession of subtle curves instead.

I'd also like to debunk a supposed 75 mile (120 km) "straight" ChrisZwolle once said there was on I-80 between Grand Island and Lincoln, Nebraska. There are several not-so-subtle curves on this section.
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Old September 22nd, 2017, 05:28 PM   #12
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The I-15 between Las Vegas and Los Angeles features some beautiful straight stretches. Check out the view at 5:25!


This one on the I-80 in Wyoming is also (1:10)
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Old September 22nd, 2017, 07:21 PM   #13
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Algeria

N22 Abdlmola - Makman Ben Amer (24 km)



N40 Boughezoul - Bouti Sayeh (25 km)



North-South new highway section between Ksar El Boukhari and Boughezoul (10 km)





Thanks to tardiz67
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Old September 23rd, 2017, 10:41 AM   #14
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In North Dakota, there is many straight roads and motorways

https://www.google.pl/maps/@47.213313,-99.8551581,7.58z
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Old September 23rd, 2017, 12:35 PM   #15
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Quote:
Originally Posted by ChrisZwolle View Post
I've checked Italy and none of the autostrade in the Po plains is really dead straight. They curve out some 100-300 m over a distance of circa 20 kilometers. This is almost unnoticable when driving.
Quote:
Originally Posted by italystf View Post
A8, Italy 29.3 km
https://www.google.it/maps/dir/45.51...a=!4m2!4m1!3e0

EDIT: maybe the junction with A9 invalidates it.
Quote:
Originally Posted by Negjana View Post
But the A8 between the A9 interchange and Galeron leads atm at 17.5km. Any longer straights?
The motorways opened before WW2, during Fascist Era, have usually more long straight stretches. I'll wrote in the new thread.
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Old September 23rd, 2017, 12:43 PM   #16
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Quote:
Originally Posted by Negjana View Post
Italy
A9, 17.5km Map

Italian motorways opened before WW2, during Fascist Era, have more and often long straight stretches. A9 till Como is one of them.
I'll wrote which motorways were opened in that time, so you can check. More strethes where interrupted by modern interchanges.


A3 Neaples-Pompei
A4 Turin-Brescia and Padua-Mestre (Venice)
A7 between Genua and Serravalle Scrivia (Southbound carriageway) no have long straights because of mountains
A8
A8/A26 between A8 IC and Sesto Calende exit
A9 between A8 IC and Como
A11 Firenze-North of Pisa (sea) (have 2 stretches changed in postwar)


There is also RA13, buildt by AMGOT near Trieste in 1945-47
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Old September 23rd, 2017, 12:49 PM   #17
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Quote:
Originally Posted by Penn's Woods View Post
What about the French A34?
No long straights there.

Interstate 80 wins the US, at least I'm pretty sure about that.

Not between Grand Island, NE and Lincoln, NE though! Many slight bends there.

Winning section is I-80 across the Bonneville Salt Flats at an astounding 48.6 kilometers!
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Old September 23rd, 2017, 02:24 PM   #18
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Lithuania loves straight roads

Here, where I live, near Kaunas, Lithuania, I was always fascinated about the quantity of straight stretches in the vicinity of Kaunas. As I found, most of them were built in 19th and early 20th century as important roads connecting important cities. Many of them were upgraded to current-day highway standards during Soviet times.
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Old September 23rd, 2017, 02:51 PM   #19
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Quote:
Originally Posted by Autobahn-mann View Post
A4 Turin-Brescia and Padua-Mestre (Venice)
A4 between Padua and Mestre would have won before construction of the Passante di Mestre, but that broke the straight!
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Old September 23rd, 2017, 03:42 PM   #20
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Yup. The Padua-Mestre straight used to be 21 km long. But now it's broken about halfway by the Mestre bypass. Anyway, the best sight along this section is the two pine trees right in the middle of the motorway near Padua .
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