I thought I would summarize the information I've come across in a way that most directly answers the question. If the roadway is not aligned, either align it or ignore it. Things to consider - It is most important to have a consistency in flow. If updating a road position generally this will mean other roads are also incorrectly aligned. It would not be good for two roads to cross where they don't physically do so, or having a road which turns sharply when mostly straight. - Accuracy can be difficult to identify. - Bing imagery tries hard to be geographically aligned but is not always achieved as hills may cause improper dimensions (rumor is Bing uses planes). - Consumer GPS is highly inaccurate and is affected by clouds, trees, mountains, buildings, and most anything else. It is best to have multiple tracks from different or the best conditions. A straight drive may not appear so just from GPS tracks. - Moving the Bing imagery does nothing permanent, do so only to help tracing shapes after verifying a proper location or ignoring incorrect location. There is no efficient way of aligning. The Potlatch editor provides multiple selection with CTRL, but can be challenging to verify the boundary connections, my findings have shown that roads tend to be incorrectly shaped along with incorrect position so hand alignment tends to be of more value. Moving a road tends to require all roads in the grid to move. This is fine in smaller cities, but would be challenging on the larger scale. As you move outside the grid there is usually good opportunity to transition into the non-hand-tuned portions without making things worse than before.before. **Degree of Accuracy**: My thoughts on accuracy is that GPS/Bing is generally acceptable for new roads. For existing roads I find it good to verify Bing with some tracks. My considerations for this - Bing does try to be geographically correct. - No matter how dated Bing is, Tiger is even more so. - Those using the maps will likely also have consumer GPS and when using overlays it is nice to see proper image/road alignment. - Don't really want to change work that has verified as correctly placed, hopefully that verification is still available.

I thought I would summarize the information I've come across in a way that most directly answers the question. If the roadway is not aligned, either align it or ignore it. Things to consider - It is most important to have a consistency in flow. If updating a road position generally this will mean other roads are also incorrectly aligned. It would not be good for two roads to cross where they don't physically do so, or having a road which turns sharply when mostly straight. - Accuracy can be difficult to identify. - Bing imagery tries hard to be geographically aligned but is not always achieved as hills may cause improper dimensions (rumor is Bing uses planes). - Consumer GPS is highly inaccurate and is affected by clouds, trees, mountains, buildings, and most anything else. It is best to have multiple tracks from different or the best conditions. A straight drive may not appear so just from GPS tracks. - Moving the Bing imagery does nothing permanent, do so only to help tracing shapes after verifying a proper location or ignoring incorrect location. There is no efficient way of aligning. The Potlatch editor provides multiple selection with CTRL, but can be challenging to verify the boundary connections, my findings have shown that roads tend to be incorrectly shaped along with incorrect position so hand alignment tends to be of more value. Moving a road tends to require all roads in the grid to move. This is fine in smaller cities, but would be challenging on the larger scale. As you move outside the grid there is usually good opportunity to transition into the non-hand-tuned portions without making things worse than before.