161–170 of 216 posts
The maximum standard height for a vehicle is 4 metres in Europe. All E-routes in Europe require that bridges and tunnels can clear at least 4 metres, otherwise they cannot get designated with the E-route. Is there a similar concept of safe routes for lorries and buses in the US?
Interstates?
The Sidney Harbor Tunnel had a similar problem. They came up with an elaborate but successful solution.[1] There are detectors and huge flashing warning signs that light up. Then, there's the last-chance sign. At the entrance to the tunnel, pumps force a curtain of water straight down across the entire roadway. Then a powerful laser system projects a giant octagonal red STOP sign onto the water curtain, filling the e…
They tried an electronic warning sign that lights up when a truck is too tall, but drivers still can't resist the lure of the hungry bridge: https://youtu.be/YQssl0sM9As?t=6 , https://youtu.be/cZrOcCXNq5c?t=5 , https://youtu.be/iQfSvIgIs_M?t=32 Might have been better off erecting a giant, no-tech billboard picturing a previous crash. But your projected water screen is awesome - they could buy one and play footage fro…
Earlier quoted context omitted.
Melbourne, not to be outdone by our rivals, have the Montague St bridge which is frequently doing in trucks. Even has its own Twitter account, because of course it does: https://twitter.com/MontagueStBridg/status/12197515386602332... https://twitter.com/MontagueStBridg/status/12068168482782535... https://twitter.com/MontagueStBridg/status/11919444569053306...
Yep! And Montegue Bridge is even smaller - 3.0m (9 foot 10) It also website counting when it last was hit: https://howmanydayssincemontaguestreetbridgehasbeenhit.com/ With full history: https://howmanydayssincemontaguestreetbridgehasbeenhit.com/h... It's also a bit hard to miss: #1 - multiple big coloured signs #2 - bright rubber things that will hit your truck and make a noise #3 - sign, flashing lights and stripe a…
Earlier quoted context omitted.
Why cant they put a swinging bar at the tunnel height some distance before the tunnel? The bar knocks the top of the truck and wakes up whoever is driving to the fact that the truck is too tall.
They don't work - well at least they aren't idiot-proof. See the comment above regarding the Montague Bridge in Melbourne, Australia. They have those height bars installed and we still routinely have trucks being peeled open. I have no idea how you can be so distracted when driving that you fail to register when your truck is whacked by those height bars, but ... ¯\_(ツ)_/¯
They've been driving day in day out on autopilot. Signs begin to blur after a while.
Why dont they make the road dip down a smidge?
They ended up raising the bridge 8".
Earlier quoted context omitted.
They tried an electronic warning sign that lights up when a truck is too tall, but drivers still can't resist the lure of the hungry bridge: https://youtu.be/YQssl0sM9As?t=6 , https://youtu.be/cZrOcCXNq5c?t=5 , https://youtu.be/iQfSvIgIs_M?t=32 Might have been better off erecting a giant, no-tech billboard picturing a previous crash. But your projected water screen is awesome - they could buy one and play footage fro…
I think the difference is that the Sydney one is very clearing telling you, the driver, to stop right now. The 11 foot 8 bridge one just looks like a generic message to all truck drivers that they should turn if they happen to be too tall. It isn't clear that it only turns on when it detects a too tall truck. If the driver of the truck thought that the bridge was too low, they wouldn't try to go under it in the first…
The Sidney Harbor Tunnel had a similar problem. They came up with an elaborate but successful solution.[1] There are detectors and huge flashing warning signs that light up. Then, there's the last-chance sign. At the entrance to the tunnel, pumps force a curtain of water straight down across the entire roadway. Then a powerful laser system projects a giant octagonal red STOP sign onto the water curtain, filling the e…
They tried an electronic warning sign that lights up when a truck is too tall, but drivers still can't resist the lure of the hungry bridge: https://youtu.be/YQssl0sM9As?t=6 , https://youtu.be/cZrOcCXNq5c?t=5 , https://youtu.be/iQfSvIgIs_M?t=32 Might have been better off erecting a giant, no-tech billboard picturing a previous crash. But your projected water screen is awesome - they could buy one and play footage fro…
Earlier quoted context omitted.
If it were done well, would there have been 100+ accidents?
I guess I don't understand why tall vehicles are approaching a bridge at such speed that they don't have time to react. It doesn't seem an abnormally low bridge in the first place.
Perhaps the simplest solution is to introduce a light hanging (eg rubber) plate to make the underpass appear even shorter so people do stop and look at the signs.
Earlier quoted context omitted.
They don't work - well at least they aren't idiot-proof. See the comment above regarding the Montague Bridge in Melbourne, Australia. They have those height bars installed and we still routinely have trucks being peeled open. I have no idea how you can be so distracted when driving that you fail to register when your truck is whacked by those height bars, but ... ¯\_(ツ)_/¯
They're not stupid, they're tired. They've been driving day in day out on autopilot. Signs begin to blur after a while.
Earlier quoted context omitted.
> You make it sound like it's normal that people would expect that they can drive into a bridge without checking the height first 1. Most people would correctly expect that road-approved vehicles would clear all bridges. 2. This one is literally a couple of inches out for clearance; it looks like the truck is 12ft (or whatever the current bridge height is), which is probably what the truck's height indication is. It'…
> Most people would correctly expect that road-approved vehicles would clear all bridges. Oh right ok that's it - in my country you absolutely can't assume this so everyone is careful at all low-looking bridges.