Only very indirectly. The reason for Reaver jams is a bad pathfinding region layout. Because Scarabs are ground units Reavers use pathfinding distances instead of normal distances to determine their attack range. Pahfinding distances across three or more regions are measured over the nodes of the intervening regions, so if the nodes are far off the shortest path the effective attack distance will be severely shortened.
Interesting. Also, there a bunch of doodad's that give 100% invulnerability to spider man damage if the spidermine approaches from the south. Here is a video showing it:
It's not the direction of approach though but of where the Mines explode, right next to the doodad where tiles are flagged as unwalkable. If you flipped Marine and Mine positions in this setup you'd get the same result.
But it's a nice, instructive video. I'll link it in the OP.