At least in the US average car occupancy is 1.6. https://www.energy.gov/eere/vehicles/articles/fotw-1040-july-30-2018-average-vehicle-occupancy-remains-unchange

At least in the US average car occupancy is 1.6. https://www.energy.gov/eere/vehicles/articles/fotw-1040-july-30-2018-average-vehicle-occupancy-remains-unchanged-2009-2017 https://www.energy.gov/eere/vehicles/articles/fotw-1040-july... In France, that average is 1.3. https://www.lemonde.fr/en/opinion/article/2022/05/03/the-environmental-transition-requires-revolutionizing-the-obsolete-model-of-individual-cars_5982318_23.html https://www.lemonde.fr/en/opinion/article/2022/05/03/the-env... If SUVs were actually regularly fully utilized, then things like HOV lanes would not work.