How do you build a bridge on a mountainside when the grade is so steep that a linear ramp isn’t possible?
Build a loop, and if one is not enough, build two. This is what engineers did when the built the Kawazu-Nanadaru Loop Bridge, also known as the Japanese Double loop spiral, in Kawazu, Japan.
This double spiral brings cars up and down a full 45 meters while being seemingly suspended in a valley between two mountainsides. The spirals measure 80m in diameter and the whole ramp section is 1.1km long.
I went down this puppy one dark and very stormy night about 20 or so years ago. It was during the tail-end of a typhoon (probably a tropical depression by that time) that had completely ruined the first day of a 3 day bus tour, that I had selected from America as a treat for myself and my late wife's mother. Traffic was greatly delayed and we had missed all but one of our scheduled stops (and that to a souvenir shop!) . The driver lurched on to get us to the hot springs hotel in Shimoda where we were scheduled to spend the night. I bought the tickets because there were things along the way that I had wanted to see, but I knew nothing of the loop bridge. As we spun our way down, there were two, maybe even three, very loud thunder claps, with brilliant flashes. It was a bit like an amusement park ride, where you think you are safe, but you're not quite sure.
Thanks for stirring a wonderful memory of a disastrous trip!
KitsuneFox: syzygy - posts I have made here do not receive much attention. I may do a detailed writeup of the now lost Edgemont Park in PA, one of the first electrified trolley parks in the world, but still debating. I'm missing 1 key bit of information.
Aug 17, 2021 10:38:20 GMT
syzygy: BRUTAL! Cars as if were matchboxes in a model town... Brilliant infos you share here in shoutbox - why not you post these?
Aug 16, 2021 17:36:00 GMT
KitsuneFox: In the early morning, before sunrise, of Augusts 11th, 12th, and 13th is reported to be the best viewing time for the Perseids meteor shower.
Aug 10, 2021 10:32:11 GMT
KitsuneFox: Davidson Seamount is the tallest known fully underwater mountain in the world, measuring 7,480 feet base to peak.
Aug 5, 2021 0:02:27 GMT
syzygy: ...and about other hills and humps... stone cold wisdom! ( :
Jul 28, 2021 14:13:17 GMT
KitsuneFox: Mount Wycheproof in Australia is the shortest recognized mountain on the world. It stands at 141 feet base to peak. A mineral named 'Wycheproofite' is mined near the location, and is the only known place it's found.
Jul 28, 2021 10:13:47 GMT
syzygy: Cool! Great extra info series about "all stars" highest mountains on Earth!
Jul 22, 2021 6:25:22 GMT
KitsuneFox: Mount Chimborazo in Ecuador is the highest mountain on Earth, as measured from the center of the planet. The peak is over 6,800 feet further away than Mount Everest, and is the closest land on earth to outer space.
Jul 22, 2021 0:13:35 GMT
SpiderX22: Big news in the Aircraft in Flight database (in Transportation) -> HUGE changes. Thanks RaveyThirteen for your post -> will be changing ownership of the collection (hopefully for me lol) -> look forward to this!
Jul 20, 2021 21:02:26 GMT