Numbers, Patterns and Shapes

http://en.wikipedia.org/wiki/Metropolitan_Atlanta_Rapid_Transit_Authority 

http://atlanta.curbed.com/archives/2013/09/10/could-marta-expansion-propel-north-burbs-explosion.php ,
http://en.wikipedia.org/wiki/Metropolitan_Atlanta_Rapid_Transit_Authority#Connect_400

http://en.wikipedia.org/wiki/ATL_Skytrain#Automated_people_mover_car_specifications

http://en.wikipedia.org/wiki/Peachtree_Center_(MARTA_station)#Construction