What: Shares of Trinity Industries Inc (NYSE:TRN) jumped as much as 12% today after the company reported outstanding earnings and guidance numbers.

So what: Second-quarter revenue was up 13% to $1.68 billion and net income jumped 29% to $212.0 million. On a per-share basis, earnings were $1.33, which was an increase of 32% from a year ago and well ahead of the $1.08 Wall Street expected.  

Earnings guidance for the full year was also increased to $4.45 to $4.75 per share from a previous range of $4.10 to $4.45 per share.

Now what: The Rail Group was the clear driver of strong results, and that doesn't look to be slowing anytime soon. The group's backlog at the end of the second quarter was $6.9 billion and orders outpaced shipments by 2,640 units. Given the bullish results and shares trading at just seven times forward earnings estimates, I think this stock has more to gain in the coming year.