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Post by rmz19 on Mar 22, 2015 12:14:53 GMT
This might sound a daft question but why do buses generally carry on after initially striking the bridge? surely the driver must hear the almighty band when the bus hits the bridge? It could be the shock or confusion that kicks in when the driver hears that bang, it only occurs to the driver after a few seconds or so when they see the roof on the road in the mirrors.
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Post by snoggle on Mar 22, 2015 18:11:56 GMT
This might sound a daft question but why do buses generally carry on after initially striking the bridge? surely the driver must hear the almighty band when the bus hits the bridge? As others have said the vehicle itself has momentum and cannot lose it instantly even when hitting an immovable object - there is still some force generated which is why the roof is sheered off but the lower bit keeps going. Also there will be a short time delay before the driver reacts and vehicle responds to whatever they do. You can't stop a bus absolutely on the spot if it's moving at any sort of reasonable speed on the public highway.
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Post by Nathan on Mar 22, 2015 19:37:09 GMT
This might sound a daft question but why do buses generally carry on after initially striking the bridge? surely the driver must hear the almighty band when the bus hits the bridge? As others have said the vehicle itself has momentum and cannot lose it instantly even when hitting an immovable object - there is still some force generated which is why the roof is sheered off but the lower bit keeps going. Also there will be a short time delay before the driver reacts and vehicle responds to whatever they do. You can't stop a bus absolutely on the spot if it's moving at any sort of reasonable speed on the public highway. The driver would still feel some sort of reaction force though. But I'm wondering surely there's some sort of sign to tell drivers if the height restriction. Plus, how can the driver not hear half the bus being ripped off!?
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Post by VPL630 on Mar 22, 2015 19:40:45 GMT
As others have said the vehicle itself has momentum and cannot lose it instantly even when hitting an immovable object - there is still some force generated which is why the roof is sheered off but the lower bit keeps going. Also there will be a short time delay before the driver reacts and vehicle responds to whatever they do. You can't stop a bus absolutely on the spot if it's moving at any sort of reasonable speed on the public highway. The driver would still feel some sort of reaction force though. But I'm wondering surely there's some sort of sign to tell drivers if the height restriction. Plus, how can the driver not hear half the bus being ripped off!? Trust me, you 100% know you have a hit a bridge when you hit one, but in most cases it's far to late to stop, anyway if you are going to mess up, you might as well finish the job off As others have said, moment keeps the bus going, you really don't need to be going that fast, buses weigh a lot and it takes quite a bit of force to stop them
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Post by sid on Mar 22, 2015 21:04:55 GMT
As others have said the vehicle itself has momentum and cannot lose it instantly even when hitting an immovable object - there is still some force generated which is why the roof is sheered off but the lower bit keeps going. Also there will be a short time delay before the driver reacts and vehicle responds to whatever they do. You can't stop a bus absolutely on the spot if it's moving at any sort of reasonable speed on the public highway. The driver would still feel some sort of reaction force though. But I'm wondering surely there's some sort of sign to tell drivers if the height restriction. Plus, how can the driver not hear half the bus being ripped off!? There are signs for height restriction but for whatever reason the driver doesn't see them or forgets what vehicle they are driving. I'm sure the driver does hear roof being ripped off but by the time they have reacted the bus has cleared the bridge.
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Post by Madstuntman on Mar 23, 2015 10:59:09 GMT
This might sound a daft question but why do buses generally carry on after initially striking the bridge? surely the driver must hear the almighty band when the bus hits the bridge? If they are going at a reasonable speed they are probably through the bridge before they realise what has happened. How quickly do you think 12 tonnes stops from 30 mph?
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Post by sid on Mar 23, 2015 11:37:58 GMT
If they are going at a reasonable speed they are probably through the bridge before they realise what has happened. How quickly do you think 12 tonnes stops from 30 mph? Well clobbering a low bridge will obviously slow it down a bit
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Post by Madstuntman on Mar 23, 2015 11:50:08 GMT
How quickly do you think 12 tonnes stops from 30 mph? Well clobbering a low bridge will obviously slow it down a bit Bit of fibreglass and aluminium? Doubt it.
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Post by John tuthill on Mar 23, 2015 11:57:25 GMT
How quickly do you think 12 tonnes stops from 30 mph? Well clobbering a low bridge will obviously slow it down a bit Maybe all D/Ds should be 'modified' like the RT in 'Live and let die' was, so that the roof rolled back off of the bus(An insult to the strength of the PRV built RT)
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