Owners may implement voluntary programs to encourage the use of carpooling, mass transit, vanpooling, telecommuting, compressed work weeks, clean fuel vehicles, and other measures that either reduce the number of commuting trips by their employees or reduce the emissions associated with those commuting trips for the purpose of creating emission reduction credits that may be used by the owners of stationary sources to satisfy the post-1996 emission reduction requirements under the Clean Air Act Amendments of 1990.