1. The flyover is due to re-open fully in June (6 weeks).
  2. There will be evening closure between 10pm and 6am from TOMORROW (18th April) but only for 12 days to complete the work.
  3. It will be closed on two Sundays between 6pm Saturday and 5pm Sunday (23 hours) – 22nd & 29th April.
  4. During this work all traffic will be diverted around the roundabout – past the P10, Hammersmith Broadway

http://www.tfl.gov.uk/corporate/media/newscentre/23442.aspx