Garrison Rd

Changing road ID #0673992713 functional class from 7 (Local) to 6 (Minor Collector).
### Description
2 lanes w/o CTL. 
AADT: E of Appleton: 7,300 (2009)
Cobb MTP FC: Minor Collector 
(segment is part of request for Garrison Rd from Powder Springs St to Pearl St)
### Justification
Coordinated with Marietta. City wishes FC to match local MTP class with this request. 
#### Entire segment
#### County
Cobb County