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From: Radey Shouman <shouman@comcast.net>
Newsgroups: rec.bicycles.tech
Subject: Re: 1972 Legnano in the news
Date: Thu, 14 Nov 2024 16:24:22 -0500
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Frank Krygowski <frkrygow@sbcglobal.net> writes:

> 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.

Same here, 11 or 12 years before some sections required repaving.  The
layer of asphalt and the structure underneath seem much thinner than in
actual roads.  The other problem is that the trails don't seem to be
cambered at all.  Water (or ice) just sits.

--