Re: Bridge bashing
- From: "Roger R" <telstar461703@xxxxxxxxxxxxxxxxxxx>
- Date: Tue, 6 Dec 2005 23:17:08 -0000
"Richard Pearson" <ritch2000@xxxxxxxxxxx> wrote in message
> But skilled drivers (HGV, PSV etc etc) should be trained well enough
> road signs regarding size restrictions if it be height or width, and
> therefore also be able to read the panel inside their vehicle and
> two measurements up, there really is no excuse for hitting a bridge
> for your vehicle to pass under, unless and it is a huge unless that
> warning signage is incorrectly stated.
For many high vehicles the top of the cab is as much as can be seen
from driving position, and it is possible that drivers become so
accustomed not having to think about the extra height above, that they
forget about it, especially if their normal routes do not encounter
any low bridges.
This almost certainly accounts for the frequent decapitations of
double deck buses occuring when the driver decides to take a short cut
back to the depot at the end of his shift and encounters a low bridge.
It is easy to see a low bridge when on the look out for one, but not
many drivers can maintain such a level of vigilance especially when
the incidence of them is so rare and they are lulled into the normal
comfort of not having to think about it and distracted by the normal
hazards presented by other road users.
> One thing I have seen which is a great idea from when I used to
> lorries was that A road up near Worksop where near the final turn
> spot on the road they have gantrys with chains hanging down at the
> the bridge ahead and if they hit the top of your wagon you know full
> you have got to stop - a great wake up call!! if this was introduced
> worst offending areas I am certain it would help
I'm sure it would.
You are probably also aware of some bridges in SW London area and
perhaps elsewhere with infra red beams on the approach setting off
flashing lights and illuminated warnings, but there the driver might
think 'What's all those lights about - I don't know what it means'
before he suddenly realises it's him.
At least with the chains - the driver knows it him straight away. Ok
for industrial areas 'up north' but in 'leafy' Surrey suburbs such
aggressive things as chains might not be acceptable to local
residents. Additionally the chains might smash the front windows of a
DD bus injuring passengers - before they are decapitated.
The old railway companies were somewhat rougues, cutting constructions
costs by building the railway lower than required to facilitate full
height bridges. The London and South Western railway built almost all
the road bridges from Waterloo out through west London to a low
height. Typically they had around twelve foot clearance but I think
the lowest on a main road was 8 ft on the then A308 (from memory) and
may still be.
Others no doubt have chapter and verse.
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