That topic is very much out of date. Please use
The WIP Patch will be able to produce this:
Note that you have a tolerance of 0.001 millimeter in your file, and the width of the road is like 260,000 millimeters. I’m not sure if that is actually a 260m wide road or if something is off with the units. But using a 0.001 mm tolerance for an object of this size is way too strict, and the produced patches will never join.
The “old” patch (avaible in v8 as Patch and in v9 WIP as PatchOld) is able to produce patches that can be trimmed provided the tolerance is increased to a value that makes more sense than 0.001.