A MegaMapRaid (MMR for short) is a special kind of MapRaid. It is a one time event virtually gathering many map editors (the goal is always over 1000) from dozens of countries, to jointly perfect one or more large pieces of the map. It is also a fantastic opportunity for newer editors to work with many senior editors to gain skills and insight into mapmaking and the Waze editing community
So far, two MegaMapRaids have been held: