Uploaded on 2015-05-01 by MarZumaquero

1)In the picture we can see the bridge at the beggining of the night in summer. There are not so many cars in the lowest part of the bridge, and there are too much lights in the upper part. 2)Invisible data: a)The few traffic of vehicles during the evening. b)The use of unnecesary light in the upper part of the bridge. 3)We can use the unvisible information given by this simple picture to save energy in the city. In the upper part of the bridge we have a tram line. During the night, this part of the bridge has to be well illuminated in order to avoid accidents, cause pedestrians can also walk there. But also, during the night, the frequency of the tram is lower than during the day, so we can know when the tram its going to cross the bridge, to illuminated it more than normally, saving energy for example the hour in which we have no tram crossing it. ][1] ![enter image description here][1] [1]: https://edxuploads.s3.amazonaws.com/1430504423281456.jpeg