Bullet Train

[Brownlie]

I ride on these trains quite often, though I don't live in those communities.

There are many people on the Metros advance -- I feel like this could be a poignant critique of Ezra Pound.
from Compton to South Central's madly quiet -- The train that goes by Compton often has a performer in it.
strobing graffiti of scourge and briefcases -- I'm not sure about the word scourge. Though, it may work to provide a strong tone, it suggests that everyone who writes graffiti is a "scourge."
standing out before the zombie addicts wearing -- Not sure about zombie addicts. It may have been said before.
dresses over pants passing time in dark brown
peacock tatter green shirts layered under
argyle sweaters tethered in knots over
midnight blue bruised concrete chipped cheeks 
turned by Los Angeles hospitality dropping change
in their leather hands for sand-paper smiles -- Interesting ending here.

Left some comments based on my opinion.