Placer County Transportation Planning Agency Share: Government AgenciesTransportation Placer County Transportation Planning Agency Visit Website 299 Nevada St Auburn, CA 95603-4617 (530) 823-4030 (530) 823-4036 (fax) LinkedIn Facebook Twitter Instagram Hours: M-F - 8:00am-5:00pm About Map About Placer County Transportation Planning Agency (PCTPA) is the forum for making decisions about the regional transportation system in Placer County. The decisions made are reflected in PCTPA’s planning a Directions Adjacent to the Auburn Amtrak Station What's Nearby? Distance: 5 10 15 20 25 50 mi.