Hi,

Try running the routing function with CrossingCost set to 0 just as a test. I'm not sure if it will help much, but it should have some effect on this since it is also applied when segments overlap, and so by default GridRouter chooses paths where the segment overlap less.

Otherwise you could do that as some kind of post-processing - e.g. sort the links by their end points, and for all groups of 3-segmented links with same starting and ending X move the middle segments to the same position.

Stoyan