Urban congestion is a pressing challenge, driving up emissions and compromising transport efficiency. Advances in big-data collection and processing now enable adaptive traffic signals, offering a promising strategy for congestion mitigation. In our study of China’s 100 most congested cities, big-data empowered adaptive traffic signals reduced peak-hour trip times by 11% and off-peak by 8%, yielding an estimated annual CO₂ reduction of 31.73 million tonnes. Despite an annual implementation cost of US$1.48 billion, societal benefits—including CO₂ reduction, time savings, and fuel efficiency—amount to US$31.82 billion. Widespread adoption will require enhanced data collection and processing systems, underscoring the need for policy and technological development. Our findings highlight the transformative potential of big-data-driven adaptive systems to alleviate congestion and promote urban sustainability. Big-data empowered traffic signal control in China can reduce vehicle trip times, creating potential reduction of 31.73 million tonnes (Mt) of CO2 emissions annually and US$31.8 billion benefits per year.
It makes no sense to put your hands up and say "well, cars are bad.
Nobody is doing that. We’re saying “cars are bad, let’s put money and effort to alternatives so people use less cars”. Putting effort into squeezing more cars on the roads is literally the opposite of that goal. This change, like many other one-more-line-bro changes might look cool, but will make situation worse, if the change will even happen at all.
Nobody is doing that. We’re saying “cars are bad, let’s put money and effort to alternatives so people use less cars”. Putting effort into squeezing more cars on the roads is literally the opposite of that goal. This change, like many other one-more-line-bro changes might look cool, but will make situation worse, if the change will even happen at all.