[Qgis-user] Layer question

[Shane]

   Hi group,

    I have a layer with roads which are lines having a style of gray 
with thin black outlines on either side.  Another layer (parking lots) 
has polygons having the same color as the roads but not outlined.  The 
parking lot layer is above the road layer in rendering order.  So road 
outlines are hidden by the parking lot layer when a parking lot 
intersects a road.

    Here's the trouble - having parking lots with no outline, but roads 
with outlines looks odd.  Is there some way to have the outlines of both 
road and parking lot layers removed from rendering when these two 
features cross?

    One method I've considered is to draw the roads and parking lots as 
polygons in the same layer?  It would make drawing the roads 
non-trivial, but the problem with outlines would be eliminated.

    Shane