Answer
Speeding is not equally dangerous everywhere. What is true, anywhere and anytime, is that the number of crashes and their severity increase when average speed increases (if other conditions remain the same) [2] [3] [4] [15] (see the question How great is the effect of speed on road safety?). However, the exact relationship between crashes and speed on a particular road depends on a great many factors, among which infrastructural characteristics, traffic volume and traffic mix.