According to my trusty copy of Management Consultancy magazine (Sept 2006) the league table of consultants to the transport industry for 2006 has the usual suspects that work in all industries (e.g. Accenture, PwC, PA Consulting), but also highlights the following as "players" in transport.Capita (I think Capita Symonds is the specific company within the Capita Group that you need for transport)The Nichols GroupHornagold & HillsConsulting StreamEC HarrisOther background notes you may find useful are that the UK transport consulting market was worth about £237m in 2005 and the biggest single firm's growth in this sector was PA Consulting - its transport practice grew 380% from 2004-5, from £3m to £14.4m revenues.