Speed limits by country do not sort road deaths: Germany, with no general Autobahn limit, recorded 33 road deaths per million people in 2021, the United States 142.

Why does the US have so many more road deaths than Europe?

The chart does not break out motorway deaths from all roads, so a direct Europe-versus-US comparison from these numbers alone is limited. What the data show is that the US rate of 142 road deaths per million in 2021 is higher than in 62 of the 79 countries charted, while most Western European countries cluster well below 50. Road death rates depend on income, vehicles, enforcement and care after crashes, not on motorway limits alone.

Experts at a national seminar on urban speed management pointed to the entire road environment as the key variable. Dr Nitin R Gokarn, Chairman of India's National Road Safety Board, said that road safety required looking at "the entire road environment and not vehicles in isolation" and stressed pedestrian infrastructure and enforcement.¹ The Centers for Disease Control and Prevention notes that drivers aged 16 to 19 have a fatal crash rate nearly three times higher per mile driven than drivers aged 20 and older, a factor that weighs heavily on the US total.³

What country has the highest number of road deaths?

Among the 79 countries in this chart, Zimbabwe recorded the highest rate at 299 road deaths per million people in 2021, the highest dot in the 120 km/h lane. Across a broader set of countries using 2019 World Bank data, the Dominican Republic ranks first with 64.6 deaths per 100,000 people, followed by Zimbabwe at 41.2, Venezuela at 39.0, Liberia at 38.9 and Eritrea at 37.9.^{2, 5}

According to countriesby.org, the top of that global ranking is concentrated in sub-Saharan Africa, and data limitations are significant: road traffic fatality reporting varies widely in quality, particularly in lower-income nations where civil registration systems may be incomplete, and estimated figures are used where administrative data is insufficient.⁵

What do road safety experts say actually reduces traffic deaths?

Road safety experts point to a combination of engineering, enforcement and road design rather than speed limits alone.

Experts at the same seminar highlighted the Safe System Approach, which recognises that human errors are inevitable and calls for roads and vehicles to be designed so that mistakes do not result in death or serious injury.¹ They also stressed safer school zones, accessible footpaths, traffic-calming measures and better crash data.¹ Autotrade.ie notes that compulsory safety technologies could help save more than 25,000 lives and avoid at least 140,000 serious injuries by 2038, given that human error is involved in about 95 per cent of all road traffic accidents.⁴

Are countries moving toward lower speed limits on motorways?

Some jurisdictions are moving toward technology-based speed control rather than simply lowering posted limits. In Michigan, legislation is being developed that would require extreme and repeat speeders to install Intelligent Speed Assistance technology, which automatically controls a vehicle's maximum speed.³ Amy Cohen, founder of Families for Safe Streets, said her organisation is working with legislators in North Carolina and Minnesota to implement the technology for repeat offenders, and that similar bills have already passed in Illinois, Virginia and New York.³

In European cities, experts at a seminar on urban speed management noted that Paris has a maximum speed limit of 30 km/h or less on 89 per cent of its urban road network, and the Brussels-Capital Region applies the same threshold to 86 per cent of its network.¹ On motorways across Europe, autotrade.ie reports that most EU member states are not yet on track to meet the EU's goal of halving road deaths and serious injuries by 2030, suggesting pressure for further safety measures may grow.⁴