The paper discusses the mode of land acquisition for public road development resulting from the process of land severance performed at the request of the owner in terms of: the legitimacy of land acquisition by the State Treasury or local government units, by virtue of law, upon the land severance approval, the compensation for taking over the land severed for roads, the possibility of restitution of partially acquired plots of land in case a road has not been constructed, and therefore the redundancy of land earmarked for public purposes. The author compares land acquisition procedures set out in historical and currently applicable regulations as well as obligation to pay compensation. The aim of the research is to answer the question of whether the regulations according to which the land allocated for roads is acquired by operation of law by public entities should be modified, and if so, to what extent. On the example of a selected city, research was carried out to determine whether the acquired land is used at a later stage for road construction and what is the scale of compensation claims paid by the municipality. The conducted research made it possible to propose solutions to modify the mode of land severance resulting in land being severed for road development, considering both rational property management and the rights of former owners for restitution in the event public entities failed to use this real property for public purposes.

The paper presents research on a novel catalytic carrier, called "streamlined structure". The carrier is a short-channel monolith, whose walls are shaped like an airfoil profile (airplane wing). The intention is heat transfer intensification coupled with moderate flow resistance. Streamlined structures with triangular channel cross-section, 3mm, 6mm and 12 mm long, were designed and manufactured using the SLM (Selective Laser Melting) technique for the experimental verification. The structures were modelled using the CFD (Computational Fluid Dynamics) software to derive flow resistance, flow patterns and heat transfer coefficients. Compared to classic structures, CFD showed intensified heat transfer, combined with acceptable flow resistance increase. CFD proved the lack of an inlet vortex, which in classical structures seriously reduces the intensity of heat transfer. The CFD has been satisfactorily verified by experiments.