From Wazeopedia

Real time closures

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Major Traffic Events (MTEs)
If a road closure is part of a larger event, it can be submitted to Waze as a Major Traffic Event (MTE). MTEs are generally determined by the scale of the event and how many people will be impacted. The closures should be submitted using the MTE sheets providedor the WME Closure tool (available to editors 4 and above in most communities). This way Waze is able to track the closures and help spread the word.
To receive further support from Waze (website and/or push + inbox message) for a closure, the event must be submitted through the MTE submission form below.