On the PHP::Impact blog, Federico Cargnelutti has another helpful tip to use in Zend Framework applications - encapsulating routes into modules.

You can encapsulate routes into modules by splitting the routes into different files and extending the Zend_Controller_Router_Rewrite class. But, what if you want to use the Redirector helper to set a URL based on a registered route?

His method creates the routing instance and overwrites the default getRoute method with a custom one in the extending class.