Speed of Lights: Sensors at Minneapolis intersections measure traffic density and automatically adjust traffic-light timing to compensate. Photo by John B. Carnett

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What makes a place high-tech? When Popular Science set out to determine America´s top cities for technology, that was naturally the first question we had to answer. We surveyed experts-academics, scientists, government officials, think-tank intelligentsia, market researchers-to determine the key indicators of
a tech-embracing metropolis. We polled our own staff, pondering what we value most about the ways in which technology and innovation affect our daily lives. Then we gathered information from such sources as the Census Bureau,
the National Science Foundation, the Department of Transportation, private foundations and medical institutes, collecting thousands of data points in six broad categories.


In our first category, we looked at the way city residents experience technology, considering such markers as use of cellphones, HDTVs, computers and satellite cable. We called this category â€connected citizenry†and weighted it as the single most important one. We also considered transportation innovation (including the efficient use of mass transit and the prevalence of alternative fueling stations); the number of high-tech job opportunities per capita; and the use of technology in education (including R&D spending by local universities and the number of students using computers
in school). We looked at the smart use of energy and, finally, at hospitals and in emergency response, including the number of clinical trials and the use of GPS by emergency-medical personnel. Then we crunched the numbers.


The results were at times obvious (Boston ranked highest in education), at times surprising (San Diego was the medical champ). But all the cities that rose to the top of our list share a broad-based embrace of technology. The winner: unassuming
yet consistently innovative Minneapolis. Read on for a high-tech tour.