If you mean this one <a href="http:&#x2F;&#x2F;tollroadsnews.com&#x2F;news&#x2F;french-low-ceiling-tunnelways-of-duplex-a86-comfortable-to-drive-not-claustrophic" rel="nofollow">http:&#x2F;&#x2F;tollroadsnews.com&#x2F;news&#x2F;french-low-ceiling-tunnelways-...</a>, it is low, but not _that_ dramatic: 2.57m