Trash barrel size

[somerfriend.livejournal.com]

As I read the regulations, city of Somerville limits trash barrels to 32 gallon size.  That's pretty small and if followed would lead to an unsightly multitude of barrels at many multifamilies.   Anecdotally it seems most people have larger barrels.  As long as you keep the barrel not full of anything too heavy, do you think it is acceptable to do a larger barrel?  

Also many barrels come with the bars that would allow the truck to lift them in.  Do the trash pickup tracks have that ability?