How swarming traffic lights could save drivers billions of dollars

Maybe you’ve muttered it to yourself, in a moment frustration, as you tap the steering wheel and stare at a persistent red. As Dr. Steven Smith points out, it’s literally true. “The way conventional systems work, you preprogram those timing systems in advance,” he explains. “But as soon as you install them, they start to age. Patterns and flows are continually evolving.”