Techniques for optimizing dual track routing

A method for routing signal traces comprising:

• routing a first signal trace and a second signal trace on substantially parallel conductive paths;
• determining the first signal trace violates a routing restriction with a first distance requirement from a drilling location on a printed circuit board and a second distance requirement based on a back-drill bit size associated with the drilling location, wherein the first distance requirement is a minimum distance from the first signal trace to a perimeter of a via at the drilling location and the second distance requirement is a minimum distance from the first signal trace to a perimeter of the back-drill bit size of a drill bit for creating the via;
• modifying the first signal trace so it satisfies the routing restriction by replacing one or more sections of the first signal trace with at least one serpentine structure, the at least one serpentine structure including:
• a first trace segment directed towards the second signal trace and away from the drilling location,
• a second trace segment connected to the first trace segment, the second trace segment being substantially parallel to the second signal trace and extending past the drilling location, and
• a third trace segment connected to the second trace segment, the third trace segment directed away from the second signal trace.