the r160a and r160b are types of new york city subway cars made by alstom and kawasaki. they were made in 2005 and delivered in 2006. by 2010 all units were in new york and were assigned to multiple routes on the new york city subway. they are new technology types. the r160a is numbered from 8313 to 9974 and the r160b is numbered from 8713 to 9942. they were both built to run on the nyc subway b division lines (lettered services). there are 4 types of r160s, they are the r160a-1, r160a-2, r160b-1, r160b-2.