With over 133,000 traffic lights and growing mobility demands, Paris's traffic management system is under increasing strain. High-density areas such as the Boulevard Périphérique, Boulevard Haussmann, and Quartier Opéra experience daily congestion, resulting in longer commute times, inefficient fuel use, and rising CO₂ emissions.

Global Enlightenment is often remembered for its language of universal rights and rational progress. Yet the harder question is how a society moves from good ideas about justice to systems that make justice dependable.