This report presents summary statistics of those candidate cycles generated by computer to be representative of the CAPE-21 data base and selects one cycle for each category that is most representative. The selections are based solely upon statistical considerations. Further evaluations of the candidate cycles must sitll be made in terms of the practical aspects of running the cycles on the dynamometer, and in terms of the physical representativeness of real operation. The cycles identified are being used by EPA as a basis for developing its test facilities. This report if being released in response to numerous requests by organizations considering the development of transient test facilities to give an indication of the types of cycles thatare expected to be used in future certification procedures. This report has been labelled as an interim report to emphasize the tentative nature of the selected cycles. EPA plans further evaluation of the cycles.