Despite efforts to encourage a shift to sustainable transportation, traffic congestion is often the focus of debates over mobility. Global demand for automobiles rose significantly in the 1990s, with annual sales stabilizing at close to 80 million vehicles since 2017. Faced with the flood of cars, for decades governments have attempted to improve mobility of citizens—some measures focus on widening existing roads and building new ones, while others encourage a switch to alternatives such as public transportation, cycling and walking.
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Source: Phys.org