! From: Don Maslin [mailto:donm@cts.com] ! ! ! On Fri, 4 Jan 2002, Lawrence Walker wrote: ! ! > Asphalt when subjected to low temperatures will buckle ! > when temperatures get milder. Likely the reason most ! > main roads out here on the Canadian prairies are laid ! > in cement slabs with a space between them. ! > ! > Lawrence ! > ! <snip> ! ! ... So that the whole slab tips when the water that enters the space ! freezes. Some of us older folks remember when Canada's approach to ! frost heaving was gravel roads - much easier to repair! Hey, a _lot_ of seconday roads in Vermont (outside of the few major cites) are still gravel, cruched stone, & dirt mix. During the winter, they don't really plow the dirt roads all that much. Just pack the sonw down. Works quite well for them. And traction is not really a problem. --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818