Appalachian Development Highway System Act of 2011 - Authorizes appropriations out of the Highway Trust Fund (other than the Mass Transit Account) for FY2012-FY2017 for the Appalachian development highway system program. Directs the Secretary of Transportation (DOT) to apportion such funds among the appropriate states to complete construction of the Appalachian development highway system.
Requires amounts made available to a state that remain unobligated five years later to be returned to the Secretary and reallocated among the remaining states.
Authorizes states of the system to loan apportioned amounts between themselves.