From Shanta Devarajan's blog:
. . . [S]ub-Saharan African countries, with an estimated death rate of 32.2 people per 100,000 population, have some of the highest road death rates in the world although they possess only 2% of the world’s registered vehicles. This rate is double the average rate for Latin America and South-East Asia, and is more than five times that of best road safety performers (Sweden, UK, and Netherlands). Road traffic injuries are already the fourth leading cause of death in people aged 15–44 years; for young men, they are the second leading cause of premature death after HIV/AIDS.
See more here.