We live in complex times in the health, social, political, and energy spheres, and we must be aware of and implement new trends in intelligent social health systems powered by the Internet of Things (IoT). Sustainable development, energy efficiency, and public health are interrelated parameters that can transform a system or an environment for the benefit of people and the planet. The integration of sensors and smart devices should promote energy efficiency and ensure that sustainable development goals are met. This work is carried out according to a mixed approach, with a literature review and an analysis of the impact of the Sustainable Development Goals on the applications of the Internet of Things and smart systems. In the analysis of results, the following questions are answered about these systems and applications: a) Are IoT applications key to the improvement of people’s health and the environment? b) Are there research and case studies implemented in cities or territories that demonstrate the effectiveness of IoT applications and their benefits to public health? c) What sustainable development indicators and objectives can be assessed in the applications and projects analyzed?

The bridge over the Ebro River is located on the sub-stretch II-b from Zaragoza to Lérida on the high-speed railway line from Madrid through Zaragoza to the French border. Its total length amounts to 546 m with the following span distribution: 18 m + 6 m ´24 m + 60 m + 120 m + 2 m ´60 m + 42 m ( Figs. 1 and 2).The unique quality of this typology led to study thoroughly both the methodology and the adequate analysis method. Since this is a deck whose cross section is not homogenous longitudinally, its behaviour is clearly tridimensional which makes it necessary to use finite elements techniques. This special behaviour results from the presence of circular voids cores in the webs as well as the discontinuous upper ribs.In the design phase a series of innovative aspects both globally and locally was analysed. This derived from the structure's great due to shear stress deformation.This specific behaviour was completely confirmed by measurements carried out during construction. Bridge Description DeckThe 546 m total span length is divided into two areas. The first one corresponds to the approach span stretch, it is 162 m long and is made of one 16 m long span and six 24 m long ones (Fig. 3). The second area is 384 m long. It becomes a great bridge over the river, made of six spans: 42 m + 60 m + 120 m + 2 ´60 m + 42 m. Both areas are completely united with no joints between them.The great Vierendeel girder has a total depth of 9,15 m. The cross section has a trapezoidal shape (Fig. 4). In the upper part it has a maximum width of 16,56 m while in the bottom part it reaches 12,90 m. The webs have circular voids of a 3,80 m diameter placed at every 6,0 m. The width ranges from 0,50 m and 0,60 m in the area of supports. The bottom slab thickness ranges from 0,30 m in the point of connection with the webs to 0,39 m in the middle. It has a set of transverse beams with a circular elevation at every 3,0 m with a trapezoidal cross section whose thickness ranges from 0,50 to 0,60 m. In the upper part of the of the box girder we introduce ribs with a circular elevation that follow the direction of the curved upper walls and keep their thickness. They are placed at every 6,0 m and their width amounts to 0,60 m except for those located over the piers whose width is 1,0 m. Over the support axis on the Abutment 2 and in the transition area with the approach spans is 3,30 m wide.The whole approach span has the same bottom slab as the main span and the same bottom shape in order to automatically establish continuity between these two spans. The lateral girder depth amounts to 2,20 m while the maximum width reaches 1,05 m (Fig. 4).The construction procedure was the incremental launching from both abutments. For this reason the deck was sub-divided longitudinally into segments, 18,0, 15,0 or 12,0 m long and one mid-span segment 6,0 m long.