1. Road traffic, vehicles and networks;Organisation for Economic Co-operation and Development (OECD),2013
2. European Road Statistics 2012;European Union Road Federation (ERF),2012
3. Transforming Ireland;Irish National Development Plan (INDP),2007
4. Economic and Social Infrastructure Operational Programme 2000–2006;Irish National Development Plan (INDP),2000
5. National Road Authority Annual Report 2004 and Programme for 2005;National Roads Authority (NRA),2004