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The city of Santander in Spain is one of the most famous Smart Cities in the world. The city has created a very important network. In the city we (better: you, one) can found find 12,000 sensors, and a network infrastructure to continually measure air quality, weather, traffic and a lot of other parameters (frameworks?)

The various sensors are used in different sectors. They are useful for drivers. To help drivers and to reduce car emissions from cars, 400 sensors are present in public parking lots to track open parking spots. 
They are also used for the environment. In effect, more than 2,000 sensors measure noise, light, and carbon in the air to help the city to obey regulations on noise and air quality. Sensors enable us/you to build a sound map to help the city comply with European Union noise regulations.

The different sensors are also located in lampposts in parks that sense pedestrians and reduce light when there is nobody around. 

Sensors are also used to control the traffic. There are sensors under the pavement at the city's entrance tracking traffic volume and location, and the speed of cars. 

We can see, through the example of the city of Santander, that the technology can help the cities to deal with their issues.