**Acknowledgement**

This work was supported in part by grant and research project VEGA 1/0421/12 - Model‐ ing diffusion of knowledge in business value chains (60%), Centre of excellence for sys‐ tems and services of intelligent transport II., ITMS 26220120050 supported by the Research & Development Operational Programme funded by the ERDF (20%) and institutional projects: 3/KS/2012 - Supporting education through educational multimedia applications [10%] and 1/KS/2012 - Sensitivity analysis of contact points to the costs arising from the provision of UPS [10%]
