The FHWA Approval (or denial) status of a requested functional classification change and whether an updated map is yet available can be checked at the WSDOT site.
Please note this entire process can take anywhere from a few weeks to a few months depending on the nature and size of the request. Please keep this in mind with regard to state and federal funding application deadlines.
If you have any general questions, please contact Gary Simonson (206-971-3276).