Ricerc@Sapienza

In this study, the conditions of visual comfort were assessed in an indoor environment intended for students. For this reason, a transversal field survey was carried out in two libraries, one at the Sapienza University of Rome (Italy) and another at the University of Granada (Spain). During the analysis, measurement of lighting engineering variables such as horizontal illuminance, corneal illuminance, and luminance was carried out at the same time. The randomly selected individuals were asked to compile the structured questionnaires voluntarily at both sites.

The high energy consumption of the lighting installations in highway tunnels has become a hot topic in the last few years due to the high figures in terms of money, consumed energy, use of raw materials, emissions of greenhouse gases due to the remarkable number of manufactured elements, and maintenance, among others. In spite of the different strategies proposed up to date and their savings, the potential benefits of decreasing the maximum speed allowed in tunnels have not been considered in depth as a complementary measure yet.

In educational environments an improvement in the quality of interior lighting has a direct benefit in increasing productivity and alertness of students and teachers, as well as very important implications for the energy efficiency of the education facilities but when a replacement with different lighting is analyzed, research may be tarnished by users’ pre-formed opinions, influenced by manufacturers and advertising. Consequently, it is necessary to understand the users’ point of view, even before of being subjected to any change in the lighting stimulus.

Buildings are heavily responsible for energy consumption and CO2 emissions. Increasing their energy efficiency is in the direction of the EU strategies; and this is consistent with EU Energy Performance of

Tunnel lighting represents a major cost item for road managers, and particularly in Italy owing to its specific geomorphological and orographic features. In 2018, ANAS, the Italian government-owned road company launched an ambitious program to rehabilitate the lighting systems of more than 700 tunnel tubes across Italy. The Greenlight plan aims to reduce consumption and improve the management of lighting systems while minimizing the impact of works.

Synopsis: This paper compares the life-cycle costs of pavement and lighting when different pavement types are built in road tunnels. Two pavements, rigid and flexible, during 20 and 30-year service life and for different traffic conditions were analyzed. Tunnel lengths between 750 m [2,460 ft] to 2,000 m [6,562 ft] were considered. The methodologies used to design and maintain both the pavements and the LED lighting systems complied with the Italian standards and practices.