When using the "Merge Divided Roads" tool, it merges roads that "trend generally parallel to one another". This means that from figure one.. It will merge the beginning, where the roads are close to each other (so the result is like figure 2), but not the entire length like I want it to (figure 3). I believe this is because the lines are not parallel enough (the angle between some of the lines are too big). Because even if I extend the merging distance to 300m (which is more than how far the roads are apart), I still don't get the result from figure 3.

Anybody know how to decrease how parallel the lines have to be to get merged?

enter image description here

  • possible duplicate of Tracklogs to single line OR several lines to one line?
    – underdark
    Commented Mar 11, 2011 at 12:53
  • 2
    I think it's closely related because it's about the "Merge Divided Roads", but not a duplicate question. The question itself does require some work, but I think the ? has potential to stand on its own. Commented Mar 11, 2011 at 13:20
  • You might consider workarounds. For instance, the centerline of the intersection of small buffers of the two roads ought to do a good job.
    – whuber
    Commented Mar 11, 2011 at 15:38

1 Answer 1


I know this post is a bit dated, but thought I would propose the use of another tool. Integrate allows the user to define an x,y tolerance, and is useful if "You want lines to have vertices wherever they intersect." I'm not entirely sure if it will work for this application but may warrant some investigation.

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