After much discussion about lock boxes and portions of pennies, the Clayton County Commission and the MARTA Board of Directors were able to hammer out contractual language and allow the residents of Clayton County to vote on joining MARTA. The final signed contract is here.
Appendix 1 to that Contract is a document titled the “Clayton Extension Report.” This document:
[I]ncludes an illustrative 10-year system plan, implementation plan, patronage estimates, and a financing plan for Clayton County transit service. The system plan describes general physical aspects such as routes, service plans, and necessary acquisitions for both bus service and rail transit.
The Clayton Extension Report includes several maps illustrating what MARTA service in Clayton might look like. With the caveat that these are examples rather than the final plans, check out the maps below.