The MassGIS import had oneway streets but whether the were in the drawn direction or reverse was not coded in the source. I found I could OueryToMap for them with [http://toolserver.org/~kolossos/osm/index.php?way=note=FIXME+unreviewed+oneway&node=&relation=&description=&request=Submit&output=osm&bbox=-71.16%2C42.25%2C-71.0%2C42.40] so have been printing maps for field checking and fixing obvious ones (like roudabouts and ramps I use regularly).

And still reverting to Highway=service the NoNames that defaulted to Residential on import, when there isn't some better fix.