WASHINGTON--(BUSINESS WIRE)--Today, as part of Smart Cities Week in Washington, D.C., Siemens formally launched its City Performance Tool, a data-driven modeling tool that helps cities calculate the environmental and economic impacts of building, transport and energy technologies. “We see the need for smarter use of data to help inform cities as they make sustained and targeted investments in order to improve city infrastructure,” said Siemens USA President and CEO Eric Spiegel. “Our City Perfo