Coded Departure Routes
Pilots want ways to mitigate bad weather. The Coded Departure Route (CDR) is one of the least-known such tools in GA, although its been available since 2007. The AIM tells us, CDRs provide air traffic control a rapid means to reroute departing aircraft when the filed route is constrained by either weather or congestion. So, if youd rather not wait, a CDR might be for you.