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NEWSLETTER
February 2004

TOPICS
Winter Maintenance


Thin Surfacing Failure

Websites of the Month


Motto of the Month
Winter Maintenance
This is a relatively quiet time of the year with regard to highways maintenance, except that it can be a very hectic time of the year for winter maintenance, as it is winter. 
The recent brief spell of cold weather was a particularly good/bad example of what winter can throw at you in the UK, and in this case I think it was the Midlands that may have suffered the most.
My own journey home took three and a quarter hours when it normally takes a half hour, so I could be regarded as one of the lucky ones. I managed this speedy trip home by giving up on the main roads and winding my way through lanes and back streets that had never been salted and driving on the rough snow rather than in the iced up wheel tracks.
Winter maintenance is not my area of expertise, but I have my opinions as does everybody else, and since I suffered a little also I feel I am entitled to air them, and I do have a little "insider" knowledge.
I have to first state this was the worst case scenario with regard to winter weather I have personally experienced, and having a "window seat" in the office so I did see it happen. 
In the middle of the afternoon there was a short period of very heavy rain, quite sufficient to wash off the considerable amount of salt that had been spread in anticipation of the forecast snow.
The heavy snow duly arrived almost immediately after the rain and laid a blanket of about two inches just before sunset which heralded a dramatic fall in temperatures, the rest we all know. People began leaving their place of work and the evening rush hour (or six) commenced with the snow rapidly becoming packed ice. 
A few minor bumps and jack-knifed lorries soon blocked the roads and we had gridlock. 
All the above is well documented by the news services, and I am aware that the various organsiations in charge of winter maintenance were trying their hardest to get gritters where they were needed but it was just impossible to do so because of the stationary traffic.
But what I am going to say, that will earn me no praise in certain areas, is that if those "in charge" did not keep demanding "efficiencies" with the centralising of salt stocks and the ever increasing length of salting routes to more "efficiently" cover the road networks without thought of the consequences, then "local" salt stocks would have still been available to more easily reach grid locked urban areas.
In my own particular case I am aware that as I passed through my own grid locked small town I was at a junction on a hill that was causing major problems that was within a few hundred yards of where the "Agency" salt pile used to be kept. If that salt pile was still there I am fairly confident that salt would have been spread by whatever means were available on the most difficult sites and the abysmal conditions in one small town in the Midlands would have been a lot less severe than they were.
This "efficient" thinking is not very BABSI, Better Access to Better Service Initiatives, which is a current politically driven idea for local authorities to embrace.
But winter maintenance is not my area of expertise, as I have said, so I will leave others to find the scape goats for the traffic chaos, as they surely will.


Thin Surfacing Failure
wheel track failure of a porous asphalt thin surfacing But I do know a little about road surfacing materials, and if "local" news services are to be believed I understand some of the "new" surfacing materials did not withstand the onslaught of two days of genuine winter weather too well.
This is a picture of a proprietary Thin Surfacing on a trunk road in the area I work. It is six years old and is shortly to be replaced, it is clear to see it is exhibiting dramatic wheel track failure. In terms of Thin Surfacing six years is quite an old material. It is my opinion that Thin Surfacing bituminous mixtures that exhibit the same compositional characteristics, and laid 30/35mm. thick as this seems to be, may well experience failure of a similar nature in the future.
I have been on site, I have watched the remedial patching being performed, I have taken what appeared to be sound pieces of removed surfacing and broken them easily in my hands. 
This material has failed, but I will leave others to decide why, unless of course you are content with a six year life of a surfacing material and all the cost and inconvenience that will result.
This is now the third example of this type of failure I have seen in the last twelve months, and they have not all been in proprietary Thin Surfacing, but they have all been in porous surface course materials.
It will be interesting to see if any further details are forthcoming on this subject from other areas of England. 
Just think what might happen if we had a whole week of winter or even a month, it has been heard of. I can remember starting my working life just before the winter of 62/63, now that was a real winter.


Websites of the Month
I am always browsing the web to see what I can find to help me better understand the work I am involved with, and I am continually surprised and grateful for the excellent information there is out there if you keep looking.
I am going to recommend two sites for you to browse if you are even half serious about gaining a better understanding of highways maintenance and what it involves.
 

Hawaii Asphalt Paving Industry (HAPI) - an exceptional resource for engineer and student 

beyondRoads.com - a community resource - visit this site if you only look at the interactive guide to asphalt mixing plants  

Please visit these sites, and the other sites I recommend on my the links pages of this website, and trawl for your own information with the main search engines.
It was not, and is not my intention to be a "one stop shop" on highways maintenance. 
But with my background I may be able to find and point you in directions where you will find more in-depth information that is better presented than I am able to provide with my limited resources.
HAPI browsing.


 Motto of the Month
"It is not what we inherit, but what we leave behind that is important"

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