Also some nice additional links at the end of the article.
Responsive Navigation On Complex Websites
Central to a solid user experience is a well-structured, simple navigation system. Over the past few months, I’ve been involved in launching two large institutional websites with complex navigation systems. Maintaining simplicity on such large websites becomes increasingly difficult as content requirements grow and tiers of navigation are added, not to mention the extra complexity added by small screens.
To illustrate the techniques involved in implementing responsive navigation on a large website, I’ll refer to two actual clients of mine. I’ll start with the process and how to get through it with research and mockups, then later get into some of the actual code that was used