Fig. 4: Reduction of CO2 emission.
From: Big-data empowered traffic signal control could reduce urban carbon emission
a Histogram of annual CO₂ reductions with percentage changes indicated by a broken line, labeled for typical cities. b Ranking of the top 10 cities by BAU annual CO₂ emissions: dark bars represent predicted total emissions, while light bars show potential reductions under adaptive traffic signals, labeled are emission reduction and percent change. c Annual transport CO₂ emission reductions across 100 cities.
