text: I've gone ahead and added the roundabout based on four GPS traces captured on the same day (latest 4 in my profile) however some of the connections to the roundabout I've had to guess (the alignment of Enterprise Drive has been finalised) https://www.openstreetmap.org/changeset/86671073
  
  Also my understanding is that the bridge will be public access; it appeared opened when I drove past so a better alignment as well as more access permissions may be found if it was surveyed irl again. 
  
  A non-odbl compliant source says that the speed limit will be dropped to 80 and in some sections will be dropped to 60 so i've left them out for now (still all roadwork signs).
  
  May be best to wait a month or so since the construction looks virtually done.
  
  (Also not sure of how to connect Chittaway Road and the road on the west side of the tracks to the road so I've done it to the best of what I could see)