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Thread: Asphalt seams on Custis

  1. #11
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    Steve O is offline I spend all day thinking about bikes and talking to people on the internet about them.
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    These are actually two different, but similar, problems:
    - Seams at transition from asphalt to concrete. This is generally caused by the asphalt settling over time.
    - Root heaves, caused by tree roots growing, duh.

    The seams benefit from adding filler to smooth the transition, which is what they did on the Custis. The heaves are fixed by grinding them down or something like that.
    Transitions can also be fixed by grinding the concrete, as has been done on sections of the 4MRT on the way to the airport.

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    Quote Originally Posted by bentbike33 View Post
    I wonder if there is an affordable technological solution to the root-heave problem on trails, other than eradicating all trailside trees? Maybe it's something the League of American Cyclists or Rails-to-Trails Conservancy could study?
    I think, because these trails do not have to bear the weight of your average road (sustained pressure from countless cars and high tonnage trucks), they are built lighter. Much thinner gravel base/ballast (if at all), and a thinner top layer of asphalt. So it is easier for a tree root to press upward and crack it from underneath. If there is anyone here from Arlington County who knows roadbuilding, please chime in! Because some of these root heaves are on fast downhills. Unless you are running a dual suspension bike, that's a big problem.

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    Quote Originally Posted by drevil View Post

    This one's for you, bentbike:
    https://www.youtube.com/watch?v=Ekefr3xH3y8
    OMG. That looks terrifying! How do you get over rocks and logs with that thing?!

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    Quote Originally Posted by Sunyata View Post
    OMG. That looks terrifying! How do you get over rocks and logs with that thing?!
    Same way as any other bike: with conviction... and your eyes closed

    I found another video of a guy riding the Porcupine Rim in Moab. I would definitely try it given the opportunity, but probably have something other than Dire Straits playing in the background.

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    Quote Originally Posted by Starduster View Post
    I think, because these trails do not have to bear the weight of your average road (sustained pressure from countless cars and high tonnage trucks), they are built lighter. Much thinner gravel base/ballast (if at all), and a thinner top layer of asphalt. So it is easier for a tree root to press upward and crack it from underneath. If there is anyone here from Arlington County who knows roadbuilding, please chime in! Because some of these root heaves are on fast downhills. Unless you are running a dual suspension bike, that's a big problem.
    This is my understanding as well. It's still cheaper to build the trails to lower standards, and maintain them more. But we have to make sure maintenance doesn't get cut.

    Arlington has a budget for this, so report issues. There's Arlington's 311 app, or kstalica <at> arlingtonva.us (the "trails" address is dead)

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    Does Arlington have a "trail sweeper" machine (like a road cleaner machine?)
    The pea-gravel/loose gravel that collects on parts of 4MRT in Barcroft Park is a skid-out waiting to happen. I opened a ticket about 2 very large spreads of pea-gravel recently... they cleared one, but not the other (and it was located about 6 feet away from the gravel they cleared!)
    I'm probably going to buy my own stiff-bristle "shop floor" broom -- because there are 2 bends in this trail that routinely collect gravel, and both are quite close to home so I could zip out there and clear it myself when the gravel warranted, rather than go through the hit-or-miss chances with a new ticket every time.
    But I did wonder if they had a machine to do it, or if they sent a worker out -- with a stiff broom.

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    Quote Originally Posted by ChristoB50 View Post
    Does Arlington have a "trail sweeper" machine (like a road cleaner machine?)
    The pea-gravel/loose gravel that collects on parts of 4MRT in Barcroft Park is a skid-out waiting to happen. I opened a ticket about 2 very large spreads of pea-gravel recently... they cleared one, but not the other (and it was located about 6 feet away from the gravel they cleared!)
    I'm probably going to buy my own stiff-bristle "shop floor" broom -- because there are 2 bends in this trail that routinely collect gravel, and both are quite close to home so I could zip out there and clear it myself when the gravel warranted, rather than go through the hit-or-miss chances with a new ticket every time.
    But I did wonder if they had a machine to do it, or if they sent a worker out -- with a stiff broom.
    I believe the snow clearing Arlington County Bobcat has a front rotating brush attachment, but I haven't seen the small size street sweepers like what was used by FES in Frankfurt to keep the sidewalks clear of debris.

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    Well, I went ahead and ordered a stiff-bristle broom so I can tackle pea-gravel on the trail when I find it.
    After Arl. closed my original trail ticket about the gravel (only clearing 1 of the 3 reported gravel patches along the trail) I opened 2 new, individual tickets (one per remaining patch of gravel.)
    This morning, one of those patches was cleared, which was great.
    But the other one still wasn't. (ie, on same trail, perhaps 1/3 mile away.)
    We'll see if I get to try out my broom tomorrow!

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    Quote Originally Posted by ChristoB50 View Post
    Well, I went ahead and ordered a stiff-bristle broom so I can tackle pea-gravel on the trail when I find it.
    After Arl. closed my original trail ticket about the gravel (only clearing 1 of the 3 reported gravel patches along the trail) I opened 2 new, individual tickets (one per remaining patch of gravel.)
    This morning, one of those patches was cleared, which was great.
    But the other one still wasn't. (ie, on same trail, perhaps 1/3 mile away.)
    We'll see if I get to try out my broom tomorrow!
    If this is a regularly reoccurring problem, I'd email kstalica <at> arlingtonva.us and request that ArlCo work this into regular maintenance -- and maybe try to find the source of the problem and prevent it entirely...

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    I did email him, after the first ticket was closed (but not all the gravel I'd reported was cleared.) I'll keep an eye out -- the worst patch is at the branch off 4MRT to cross the "fjord" bridge over to the baseball fields -- there is pea gravel adjacent to the trail (perhaps in-fill?) and I wouldn't be surprised if the powerful storms swept it onto the trail...

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