What's the highest (fastest) posted mandatory maximum speed limit sign worldwide?

Upvote:1

In Saudi Arabia, the speed limit was increased to 140 km/h in many highways , the previous speed was 120 km/h with a +10% allowance for speed radar which is not applicable for the 140 highways.

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Upvote:2

There were (and maybe still are) dynamic 140 (kph) speed limit signs on the A2 motorway in Germany. They were mildly controversial because although there is no overall permanent speed limit, there is a recommend maximum speed of 130 kph.

Upvote:2

Since 2011-01-01, the maximum speed on Polish motorways has been 140 km/h, previously it was 130 km/h.

There were tests for 140 km/h in Germany (2004-??) and Austria (2018-2020) on motorways.

In July 2021 the highest known speed driven on a German moterway was 417 km/h over a 10 km distance between Berlin and Magdeburg (as compaired to the maximun known speed of a Formel 1 race of 370 km/h).


Sources:

Seit dem 1. Januar 2011 beträgt die Höchstgeschwindigkeit auf polnischen Autobahnen 140 km/h, zuvor galten 130 km/h.

Upvote:7

There are speed limit signs posted on the Node 1 (aka Unity) aft hatch of the USOS (US Orbital Segment) of the ISS (International Space Station):

Photograph of NASA Astronaut Ellen Ochoa posing in front of the 17500 mph and 28000 km/h speed limit signs on the International Space Station

They read 17500 mph and 28000 km/h, respectively.

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