This part of EN 1317 specifies requirements on the impact performance of terminals@ performance classes@ lateral displacement@ vehicle redirection classes@ terminal direction classes@ VCDI and impact severity levels. NOTE This European Standard should be read in conjunction with EN 1317-1. Both these standards support EN 1317-5. The modifications included in this European Standard are not a change of test criteria@ in the sense of the EN 1317-5:2007+A2:2012@ ZA.3. The performance of a terminal in general is dependent on the barrier connected.