Thursday, July 7, 2011

North-south highway 3rd lanes

Posted by Muhammad Effandie Nordin at 10:34 AM

North-south highway - the new 3rd lanes 
Just got this from my friend who builds highways. 
This is true! I have another friend who works as pavement contractor and he shared the same thought!

All you frequent users of the North-South Expressway
Be more cautious when driving on the third lane.

North-south highway 3rd lanes
I am a frequent user of our North-South Expressway and I have this IMPORTANT experience to highlight and share:-

I am a building contractor based in Penang with over twenty years of experience and I have been driving my 5 series BMW (latest generation and a dammed solid road-holding car) each time I travelled to KL. Lately, the new extended 3 lanes highway had been opened up for use and since then, I have also been using it quite often.

HOWEVER, when I used it each time it is WET, I can really 'feel' that the new road surface is extremely SLIPPERY! To share with some of you, my car comes with a built-in traction control mechanism ( skidding prevention mechanism ) and you can feel it each time it is activated. Previously, I don't come across this kind of slippery feel except when I drive over a paddle of water at certain speed.

From my observation as a building contractor, the 'wearing course' of the new road surface could be TOO FINE OR TOO SMOOTH and TOTALLY UNSUITABLE for highway use!

The wearing course ( top premix layer ) mix design for highways should be of minimum 20mm coarse aggregate mix that will give us the required bond between the surface and our tyres. Fine wearing course ( 14mm coarse aggregate size and below ) is only suitable for normal road. ( A proper test need to be carried out to determine the mix design of the wearing course ).

Since the opening of the three lanes highway, I had seen cars skidding in front me or in the opposite direction and approximately 2 weeks ago, one of my friends who is also a frequent user of our NSE, came to share with me about his slippery feeling as well as the many skidded cars he had seen lately.

I am highlighting this to TV3 and The Star with the hope that a thorough investigation could be carried out immediately to find out how or what causes the bus to skid. A proper and independent test need to be carried out urgently to determine the design mix of the wearing course. THIS CAN SAVE LIVES.  



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