ScottZane wrote:I would suggest using caution when selecting a node (circle piece and not a segment, which is a line) and hitting the Allow All Turns option. Generally speaking, U-turns should not be allowed at most junctions (including dead-ends). They should only be allowed at intersections where they are legal (and encouraged). Using the Allow All Turns option will enable all turns (including u-turns).
This is not my experience...while I heartily agree that great caution is required when plowing through a pile of nodes and cleaning them up with the famous (or infamous) 'qw' key sequence (q = 'Disallow all connections', w='Allow all connections'), when I do this the junction is left with all U-turn DISabled.
Regardless, 'qw' for all its power is very dangerous. A left turn may be illegal at a certain node -- gone. U-turns may have been enabled at a certain junction because it is a 4-way stop and by state law they are legal -- gone. A timed restriction may have been lovingly set with detailed inspection of the signage using street view -- gone.
When an area shows up as a total mess when viewed with the WME Validator Chrome plugin, I tend to be a bit less cautious with 'qw' because the area clearly hasn't received THAT much care and attention.
In a place that's a real mess, like original basemap import, you could fly through all the nodes with 'qw' but then come back and look for ones that need special treatment.