Exactly, the roads we have in Nigeria are bad though not all bro.
You really settled down to puzzle the origin of the problems well.

Nigeria has become a dumping zone where condemned cars are reused and not recycled for a better performance.

Thanks to Isaac Newton, that genius did wonderfully well as regards his experiment and explanation of momentum and collision in his second law of motion.

What we need now is a good government where embezzlement of public funds will be far fetched