1. HigginsonM.: ‘Bus Priority’ (Network Management Note published as a supplement to Highways and Transportation March 1999 The Chartered Institution of Highways & Transportation 1999) http://www.ciht.org.uk/en/document‐summary/index.cfm/docid/EC9F07E3‐6C0C‐4EE4‐8B260D6E041A69B3 accessedJanuary 2013
2. PRISCILLA: ‘Public Transport Priority: State of the Art Review’ (Deliverable 2 PRISCILLA Project IST‐1999‐20222 Information Society Technologies Office Brussels Belgium 2001)