How to get US traffic to a site??

[frank]

First of all you should set USA as your targeted zone in your webmasters tool settings(both Google & Bing).
Secondly, you have to target keywords which are mostly searched from the US & write articles relevant to those keywords.
And the last once you have prepared your article you must get proper outreach to your article to the US audience by spreading them through the social channels, submitting to the US local directories, bookmarking sites etc.