The DC Department of Transportation (DDOT) Roadway Safety Branch requires different documentation, depending on the issue:
A concurrence is for speedhumps, the endorsement is for regular requests (no more than 3 contiguous blocks) and ANC Resolutions are for numerous, more extensive requests .
One way to avoid closures is not to create a Service Requests at all. Ideally, Traffic Safety Assessment Questionnaires should be submitted (with endorsement, etc.) to traffic.safety@dc.gov and DDOT will create/assign a Service Request #. That number will then be referenced in the official acknowledgement that is sent back to the requester.
If a Service Request is created and the follow-up TSA and endorsement, etc., is not submitted after 40 days, it is closed via an automated process.