Investigation of the permitted level of damage of vehicle safety glass

Glass plays an important role in a vehicle, and it is essential to preserve the safety and security of passengers. It is called safety glass because it does not create sharp edges in the case of breaking, which can injure drivers and passengers, but scatters into many small pieces that are not dangerous (tempered glass) or remain held in place by means of an interlayer (laminated glass). During the operation of the vehicle, the glass is often damaged due to the impact of stones or other objects. The level of damage (size and character) and its location on glass determine the extent to which the safety of the use of glass is impaired. This paper presents the basic characteristics of safety glass installed in vehicles, the requirements which must fulfilled, as well as criterion for assessing its technical correctness in the technical inspection procedure. The significance of this research lies in the fact that state institutions can improve the legal regulations in the field of technical inspections of vehicles, while transportation companies can achieve appropriate financial savings in vehicle maintenance.