Under "expected conditions", the development team would like changes to propagate to the client within 24-48 hours of it being updated in the Editor. However, due to current limitations of the system, updates in Cartouche or Waze Map Editor (WME) can take as long as 4 to 6 weeks to propagate to clients.
More information on when tiles are updated can be found at status.waze.com and waze.com/blog.