A Priority Development Area (PDA) is a neighborhood within walking distance of frequent transit service. Cities, including Mountain View, suggested PDAs as Plan Bay Area was being developed. 80% of housing needs/production in the next 25 years is expected to be in PDAs. Mountain View envisions five PDAs: Downtown, El Camino Real, San Antonio, N. Bayshore and Whisman Station. Not only are the PDAs supposed to be near good public transit, but there is supposed to be a close jobs-housing connection.