Smart city technologies are on display again at Mobile World Congress (MWC). This year, they are bigger than ever — and more advanced.

AT&T and a host of smaller companies worked with the MWC’s organizer, GSMA, to pull together dozens of Internet of Things (IoT) demonstrations in a major portion of Hall 3. The advances include taking data from cars on the road to help weather trackers, and augmenting that information with big data.

For example, if a car’s wipers get turned on, that could be automatically transmitted to a database that would know historical cold weather patterns and whether the rain would quickly turn into ice. Then the data could deliver insights about whether that portion of the roadway is particularly curvy or hazardous in the best conditions. In turn, a road crew, or even emergency crews, might be automatically sent out to the area.

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