20 km/h is not casually speeding, it's willfully -- or at least ignorantly -- risky and dangerous driving in most situations. Altho highway and residential str

20 km/h is not casually speeding, it's willfully -- or at least ignorantly -- risky and dangerous driving in most situations. Altho highway and residential streets are certainly different situations. http://www.who.int/violence_injury_prevention/publications/road_traffic/world_report/speed_en.pdf http://www.who.int/violence_injury_prevention/publications/r... https://www.science.org.au/curious/technology-future/physics-speeding-cars https://www.science.org.au/curious/technology-future/physics...