• | Civil Aviation Authority: 2001. |
• | NMa (Dutch competition authority): 2001. |
• | Ministry of Economic Affairs (advisory committee cost benefit analysis Amsterdam Airport Schiphol). |
• | European projects: MC-ICAM, TIPP, FUNDING, DIFFERENT. |
• | Volvo Research Foundation (Competition between modes in urban transport; fundamental research): 2004-2005 . |
• | NMa: 2010 (subcontract from GAP). |