The BC Ministry of Transportation has recently started a blog, following in the footsteps of others, like, "The Fastlaneā€, the blog of the US Secretary for Transportation, Ray laHood. One of my favourite recent posts shows the importance of following spring road limits, with these two photos (click on the photos for a link to larger copies, and the associated post and story behind them):

hefty1    hefty2

Asphalt roads are termed ā€œflexible pavementā€ and require particular care in conditions where snow melt and wet conditions alter the strength of the base and sub-base courses, particularly in areas where freeze thaw cycles are prominent. In the case above, the asphalt behaved in a brittle manner due to the underlying weaker saturated layers that no longer provided adequate support for the heavily laden truck.

This blog TranBC, along with the Living Watersmart Blog, are two from the BC government that are in my feed reader and provide interesting information about the services and programs of the ministries. Iā€™d like to see some discussion on the TranBC site on government policies and direction on peak oil, transit and alternate energy sources for transportation.

Published by Mike Thomas

Mike Thomas P.Eng. ENV SP, is the author of and Director of Engineering at the City of Revelstoke in the Interior of British Columbia, Canada.

2 replies on “Road Load Limits”

  1. Even the small roads need care taken. Where I live is a “no through road” and my next door neighbour has quite a large grass verge on the side edge of his property which he seldom sees as his driveway entrance is around the corner.

    The trouble is that the property opposite mine has had a group of tenants and between them they drive about six trucks. Four of of the trucks have been parking on this verge, with the left wheels on the road.

    I noticed the other day long lines of cracks in the roads, and these fill with water and expand and contract and will only get worse as they fill with earth and the grass starts growing.

    Also the edges of the road are not cleaned of leaves etc, and this leads to a buildup of earth and weeds and the road gets narrower and weaker. I think cleaning the edges of roads to help keep them in good condition could be done by “volunteer” labour.

  2. These are great resources. I think it’s important to lead the discussion, especially since ordinary people aren’t aware of the common limitations of the roads they drive on. Janice, sometimes the “small roads” are too often the forgotten roads!

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