1

Can't be connected by car = a regular individual can't drive a regular vehicle between the two countries, including via another country.

I'm not interested in the case where driving is made impossible because of some military conflicts, e.g with North Korea.

I'm aware of (Panama, Colombia). Is there any other such pair of countries?

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  • 3
    Almost a match, Brazil-France border has only been open to cars for 5 years on the Oyapock River Bridge
    – Vince
    Jan 11 at 17:27
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    @Vince I believe you could have gone through Suriname and Guyana.
    – jcaron
    Jan 11 at 17:38
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    I doubt there are many other examples. It would nearly require the two countries to have a coast-to-coast border (not that many) without any crossings, otherwise via 3rd countries there's going to be a more or les convoluted way. Just in case, do crossings using a ferry across a river count?
    – jcaron
    Jan 11 at 17:43
  • 2
    Would India and China count? See politics.stackexchange.com/questions/63632/…
    – JonathanReez
    Jan 11 at 19:14
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    I was all set to throw out Indonesia/Papua New Guinea but it does appear that there's a land border crossing on the northern coast near Jayapura. Jan 11 at 20:04
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There are no roads connecting Suriname to any of its neighbors (France, Guyana, or Brazil), though there are ferry connections over the rivers to Guyana and France.

(Wikivoyage says that there's a road between Suriname and Guyana, but it's wrong: satellite imagery clearly shows a hole in the road, and travelers' reports clearly state that a transfer to and from the ferry is required.

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  • 2
    Yep, I crossed that border 3 years ago and there was no road for sure, ferry was the only option
    – Kuba
    Jan 12 at 8:09
  • 1
    A bridge is apparently in the works at the same location, but it's still early days. Check back in 5–10 years. Jan 12 at 19:38
14

The Italian Republic and the Vatican City State

Wikipedia states

The Vatican City State, also known simply as the Vatican, became independent from Italy with the Lateran Treaty (1929), and it is a distinct territory under "full ownership, exclusive dominion, and sovereign authority and jurisdiction" of the Holy See, itself a sovereign entity of international law.

The page Travel to Vatican City states

Driving: In Vatican City, they drive on the right side of the road, but it is highly unlikely that you will ever drive inside the Vatican. The only way the public can drive in the Vatican is if you’re there on official business and enter a via parking lot near St. Ann’s.

So it qualifies under OP's conditions

  • a regular individual can't drive a regular vehicle between the two countries

  • there is no ongoing military conflict preventing it

7

Various Antarctic territorial claims provide "land borders" that cannot be crossed due to the lack of roads, including:

  • Australia & New Zealand (160°E)
  • Australia & France (142°2′E and 136°11′E)
  • Australia & Norway (44°38′E)
  • Norway & United Kingdom (20°E)

None of these countries share a land border anywhere else in the world, of course. EDIT: As was pointed out by Nate Eldridge in the comments, it is possible to drive from Norway to Gibraltar, which is also a British Overseas Territory; so the last of these does not qualify.

For the purposes of this question, it is probably best to draw a discreet veil over the conflicts between the claims of Chile, Argentina, and the UK, as they make the concept of a "border" ill-defined. The Chile-Argentina border on the South American continent is relatively easy to cross anyhow.

enter image description here

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  • Are you sure you can't drive from Norway to the UK?
    – Doc
    Jan 11 at 20:41
  • There is no car traffic in the Channel tunnel, cars go on a train.
    – Willeke
    Jan 11 at 20:45
  • 1
    @Doc: Depends if you count a ferry or the Chunnel as "driving". But if you count ferries as driving then the Panama/Colombia link might not count either. Jan 11 at 20:45
  • From the north you can drive as far as Yaviza in Panama, and from the south as far as Turbo in Colombia. How far can you get towards each of these Antarctica borders, and from where, in "a regular vehicle"? Jan 11 at 21:42
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    Actually, I think you can drive from Norway to the UK, without ferries or Chunnel: goo.gl/maps/4pUZXoGzh1mhamZH6. Gibraltar is a British Overseas Territory just like the British Antarctic territory is, so if you count one you've got to count the other. :-) Jan 12 at 3:45
5

Singapore and Malaysia are connected by a causeway and a bridge, with the Causeway in regular times being the world's busiest border crossing by some measures.

However, due to COVID-19, for time being both are completely closed to private passenger vehicles: the only way to cross is by designated bus services.

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    Isn't the bridge technically closed because of the war against COVID, breaking OPs rules? :)
    – JonathanReez
    Jan 12 at 7:22
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    @JonathanReez that's not a "military conflict". Jan 12 at 13:01
  • 1
    @WeatherVane You missed the joke re: "war" on COVID... Jan 12 at 13:59

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