The contribution to the urban heat islands exploration: underpasses and their elements

Final and other layers of road structures and their corresponding elements significantly affect the generation of heat islands in areas in which they are located Air temperature increases in relation to the surrounding areas during the formation of heat islands. This paper presents the results of field research which measured the temperature of all elements of two road underpasses, which are integral parts of the D7 (E73) state road in the city of Osijek, the Republic of Croatia. The tests were conducted from April to November 2014. The aim of the performed tests was to determine the effects of solar radiation on the temperature of constituent elements of road underpasses. The measurements were performed with the aim of determining the dependence of location of individual elements of the construction in space and material properties of which the same are made. The obtained test results indicate that the temperatures of the observed elements of the road underpasses significantly vary depending on the position within the construction, surface albedo and external weather conditions.