4 ms·
I never understood the high-tech approach to this problem. Where i am from they have large metal tubes dangling down a ways in front of the bridge. Makes it sou
by cam_l 6y ago
I never understood the high-tech approach to this problem. Where i am from they have large metal tubes dangling down a ways in front of the bridge. Makes it sound like you have already hit it.
Another more insistent approach I have seen elsewhere is to mount a large steel bar across the road, which takes the top of the truck off before they hit the bridge.
(edit:not very simple problem, obviously..)
- georgebarnett 6y agoThere are metal bars. Why do you think the team at the tunnel would go to such lengths and expense if there was a simple solution?
- marcinzm 6y agoFriendly bit of advice, you may want to work on your hubris. In general, when a group of experts implements a complex solution there is a reason for it. Rather than reveling in your ignorance and feeling of superiority you may want to instead research those reasons. Fyi, others in this thread have listed them.
- cam_l 6y agoWasn't meant to read as hubris, I genuinely was curious (if a little unclear). FWIW I have read about this at length generally at a local level, living and working next to a couple of bridges with this issue. A high tech approach has been tried and abandoned with these bridges as they were (fatally) not effective (though not this high-tech). I naturally assumed there was some particular reason for the tunnel. I read the rest of the thread before I commented, the ones you point out were written after, and they do indeed go some way toward explaining that particular issue at that particular tunnel. The original post did not explain anything but the bad road design. While we are giving friendly advice, your comments may be better received if you gave them in a spirit of generosity, as I have taken yours, rather than jumping straight to judgements and epithets.
- twic 6y ago> Friendly bit of advice, you may want to work on your hubris. In general, when a group of experts implements a complex solution there is a reason for it. As an aside, i work in the software industry, and here, that is absolutely not the case at all.
- marcinzm 6y agoSo do I and I disagree. I've often seen people make this claim only to have their "simple" rewrite crash and burn. They assumed the requirements were X and the system was overly complex for X. The requirements were in fact X+Y+Z+W and the system was complex to satisfy all those requirements. I've found that approaching these with the question of "what drove them to implement such a system" leads to much more enlightenment than going from the point of "they're idiots for implementing it this way."
- bewaretheirs 6y agoThe 11'8" bridge has your second option: a heavy steel beam mounted a couple yards ahead of the bridge, braced to absorb the impact required to cut the trucks down to size. It's more obvious in footage from the camera located on the left side of the bridge.
- numpad0 6y agoIn their defense, the metal crash beam on 11’8” bridge is visually very discreet that I wasn’t sure if there is one from YouTube videos.
- ptr 6y agoThe gas tank on top of a bus in Stockholm exploded when the bus was about to enter a tunnel protected by a metal bar: https://youtu.be/4pVStENP_Y4 https://youtu.be/4pVStENP_Y4
- Aeolun 6y agoI mean, that sucks, but the same thing would have happened if it had entered the tunnel? Only possibly worse, as I assume the explosion would have nowhere to go but down.
- zentiggr 6y agoSo the bar did the job of ablative armor, per se. Still not remotely optimal but avoiding damage to the tunnel requiring far more blockage seems like a good tradeoff.