Things like Evacuation Ctr, Hurricane Shelter, etc. are P/R codes in which can be entered alongside a Route reading. Another example of this is when the signs blank out after a reading. The blank sign reading is a P/R code.
Temporary while the fixes up LIB's Orion Vs for their DOT inspections and to prolly kill the bus shortage there. 19 Orion Vs between the CNG depots are over at LIB.