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HARD SHOULDER
Page 9
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BETWEEN THE LINES
The Oxford English Dictionary defines kinetic energy "energy which a body possesses by virtue of being in n So what's that got to do with the price of fish? Nothing, e that big trucks tend to have a lot of it the kinetic enerm the average 44-tonner can be released with the force cal small bomb when it hits something hard.
The specification for UK crash barriers says they should contain a 1.5-tonne vehicle striking at 70mph at an angle of 200. Think of an out-of-control artic doing 56mph then arrange the following words into a well-known phrase or saying: "BL like, through, knife, a, hot".
Recently my well publicised support for solid concrE central barriers was roundly pooh-poohed by a senior executive of the Freight Transport Association on the gr that these barriers tend to deflect colliding vehicles bac the traffic stream. For the record I HAVE seen an artic hi concrete barrier. The wall separated two multi-lane sect the M20 and there was no doubt which one came off thi it wasn't the barrier More importantly, having hit it, the stayed where it was. Job done.
So, given the choice of bouncing back into the carriageway or crossing over for a head-on collision, wt would you choose?
In recent conversation with the Highways Agency I I that while the 26 miles of concrete barriers around the N have been subject to a number of major impacts not on resulted in a vehicle breaching them, while the impacts themselves have needed no repairs whatsoever OK, so you can put them everywhere but concrete barriers remain the ideal barricade for those stretches c motorway where there's a high-risk of HGV cross-overs, as where motorway lanes are being widened and cons crews need proper protection.
Moreover, they tend to be able to meet the H2 barrie specification that means they can withhold the impact c 13-tonne coach or bus.
"The wall separat mufti-lane sectio and there was no one came off the
Big trucks need big barriers -QED.