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Old 5th April 2013, 13:01   #16
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Default Re: New Wire ropes to curb Mumbai - Pune Expressway Accidents

This is a nice idea that has been brought up. Good that the Indian Authorities are putting some efforts in learning from the Western world safety features. Only time will show how much these ideas prove as a boon or bane.
However, everything has + and - stuff.

+ves
As stated in the article, it would stop the vehicle crashing over into other lanes, but strongly holding the vehicle in the same line till it comes to a halt.

-ves
Well, as racer_ash stated above, what if the wires cut through the metal sheet of the door panels while its rubbing through the wires during coming to a halt ? And as vivekiny2k says if some soul is nearby, the snapping wires would drag everything into its path including vehicles following the previous vehicle !!

Would we be witnessing a "Final Destination" kinda scene ?

Last edited by Soumyajit9 : 5th April 2013 at 13:03.
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Old 5th April 2013, 15:11   #17
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Default Re: New Wire ropes to curb Mumbai - Pune Expressway Accidents

Quote:
Originally Posted by racer_ash View Post
...I will not be surprised if these wire ropes will simply cut into the metal due to rubbing at high speed.
Well these aren't really wires or ropes -- they are fairly thick, so the force is spread over a greater area, making this unlikely.

Quote:
Originally Posted by mav2000 View Post
I just hope that these high tension wires are properly fit ... I dont know if many of you have even seen the effects of what a wire of that type can do when moving at speed. It can probably cut a man in half.
Highly unlikely that they will break.

From a website :
The TL4 heavy vehicle impacts are performed with a 2,000kg pick-up truck travelling at 100km/h and 25 and an 8,000kg rigid truck travelling at 80km/h and 15.
Quote:
Originally Posted by Octane_Power View Post
At expressway speeds IMO these high strength wires may act like metal "cutters" or "slicers" doing more damage than good. BUT, I may be gravely wrong because the authorities implementing this must have done a good amount of ground work before giving the plan a "Go Ahead".
Any SAFETY device is THOROUGHLY tested in all kinds of situations before making it to the market! (At least internationally )

Some pictures of what these things might look like :

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One thing to keep in mind with wire barriers is the concern for motocyclists - though that's not an issue on the Mumbai-Pune expressway, since bikes aren't allowed on it.

cya
R
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Old 6th April 2013, 14:08   #18
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Reporting now from Mum-Pune Express Hwy;

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Hardly about 1 km installed till now before 2nd toll naka en route pune

The installation looks decent :thumbs up
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Last edited by karan561 : 6th April 2013 at 14:16.
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Old 6th April 2013, 14:48   #19
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Default Re: New Wire ropes to curb Mumbai - Pune Expressway Accidents

Wont these wire ropes cause whiplash injuries if they ripp off during a crash??
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Old 6th April 2013, 18:19   #20
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Default Re: New Wire ropes to curb Mumbai - Pune Expressway Accidents

Quote:
Originally Posted by jaysmokesleaves View Post
Wont these wire ropes cause whiplash injuries if they ripp off during a crash??
Read my post above.

Not only are the cables extremely strong, but the amount of flex/movement in each nearby post when a vehicle makes impact greatly reduces the stresses on the cable.

Think of it like jumping out of a first floor window onto a stretched safety blanket. If the blanket was stretched across rigid posts, it would be more likely to tear on impact. However, if there are people holding it, the impact will pull them forward and reduce stress on the blanket as well as slow down the rate of deceleration of the moving object.

cya
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Last edited by Rehaan : 6th April 2013 at 18:31.
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