Northern Ireland: Details of Ulsterbus and Metro from 2006-07 to 2010-11 June 1, 2012 | Data & Statistics In 2010-11 Ulsterbus had 1,175 buses, while Metro had 294 buses, with the average bus ages were 6.2 and 8.0 years, respectively. Since 2006-07, the average bus age has decreased for Ulsterbus but incr... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password