It's unfortunate that you had experience such scenario, and may their souls rest well.

If am to add to what you said, the road might be sloppy or hilly but the main fault still lies with the drivers. Because understanding the condition of the road and seeing it, they are suppose to know that over-speeding and overtaking at that kind of place is very dangerous.

Innocent lives were lost because of the reckless decision of some of the drivers. I hope all public transport drivers understand this better