Second sub-site level horizontal navigation

Question

In SharePoint 2013 Enterprise, I have a publishing site collection on a master page build with the Design Manager. The global top-level navigation contains links to various sub-sites. Their desire is to have a horizontal sub-site navigation underneath the
global navigation. This is identical to the issue at the link below, however for SharePoint 2013.
http://social.msdn.microsoft.com/Forums/en-US/d2704d33-d285-4d8c-8a4e-6e66cf36a9fc/top-navigation-how-to-add-a-second-layer-for-sub-sites?forum=sharepointcustomizationprevious
On the root site of the site collection:
Global nav: Department 1  |  Department 2  |  Department 3  |  Department 4  
No sub-nav
At the sub-site, for example in Department 2's sub-site:
Global nav: Department 1  |  Department 2  |  Department 3  |  Department 4  
Sub-nav: Dept2-page1 | Dept2-page2 | Dept2-page3 | Dept2-page4 | Dept2-page5
What is the best practice way of adding a 2nd sub-site level navigation?
Also, as an option, would this solution work in a custom page layout file?

Answer 1

I was able to accomplish this by first creating a SharePoint List of Titles and URLs (text field) for the secondary navigation, and then generating the <ul> using the SPServices jQuery library inside of a custom page layout. Alternatively, this secondary
nav could be embedded into a Content Editor or inside a Master Page rather than a Page layout, but this suited my client's business case the best.
You can find more info on the SPServices on their codeplex site.