Is RailAmerica the little engine that could?

Investors who felt left at the station after Warren Buffett bought out the part of Burlington Northern Santa Fe (BNI) railroad he didn't already own might just have an under-the-radar transportation play of their own.

Tiny RailAmerica (RA) not only enjoys the same economic tailwinds at its caboose as Burlington Northern, but it also has potential upside from consolidation in the highly fragmented short-line and regional rail segment of the industry in which it operates. That's part of Citigroup's (C) thesis, anyway, as analyst Matthew Troy started coverage on RailAmerica at buy with a $16 price target last week.