In 2019, the Dallas Innovation Alliance installed an archway of rainbow-colored lights that could change for events or holidays, such as a red, white and blue scheme for the Fourth of July. And the display doesn’t just make the passage more pleasant: Sensors embedded in the dynamic lighting system detect pedestrian traffic, allowing the city to assess the public’s use of the tunnel, says Jen Sanders, executive director of the North Texas Innovation Alliance, a consortium formed to integrate smart technology efforts across the region.