Re: 1972 Legnano in the news

On 11/14/2024 1:43 PM, Frank Krygowski wrote:

On 11/14/2024 10:43 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

>

The rail trails leisure cycle routes if tarmac seem to last almost
indefinitely, ...

 That's not what we've seen locally. In two local trails, the destructive culprit seems to have been tree roots running laterally under the trail. Yes, it took a while - more than ten years - but the roots have raised series of sharp "speed bump" ridges, probably 2" high. One trail has just a few of them, spaced so I can hop over them on the bike; but the other has such a dense network that the only way through is to stand and slow to about five mph until one's past that section.
 

Rail trails in the NorthEast US also undergo freeze/thaw cycles as much as +/- 20F from freezing in one day, for several days at a time across the winter months. Since these trails aren't built to handle motor vehicle traffic they can frost-heave rather significantly.
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