The aim of this thesis was to demonstrate that IVECO buses are safe for all passengers, including the most vulnerable individuals, such as those with AIMDs. During this process, it was fundamental to define first what are the regulations dedicated to automotive sector, possibly dedicated to buses, and those dedicated to AIMDs. The review and identification of the relevant standards and exposure limits were essential to define a reliable and repeatable measurement methodology. This analysis highlighted several significant weaknesses in the current regulatory framework.The combination of an outdated regulatory framework and the significant improvements in technology and scientific understating highlights the need for a revised regulatory approach.