An IEEE mobile wireless standard finalized in 2008. Although the 802.20 working group was established before 802.16e was standardized, 802.20 was designed to be a complementary technology. For example, 802.20 is optimized for transceivers moving at speeds up to 155 MPH. People in trains might require 802.10, while people walking or riding in cars may use 802.16e. See 802.16.