2hrs ago I was on switchbacks coming up into the mountains outside of San Jose Costa Rica. I come around one and bam there’s a 7-9 year old girl walking up the road in the middle of the lane. How the mountain roads in Costa Rica don’t run red with blood I don’t know.
This is why you always need to adjust your speed so that you are capable of comfortably stopping in the area of road that you can see clearly.
If you're going around a blind turn or over a hill or any other situation where you can't see very far ahead, you need to slow down so that you can safely react to surprises in the road.
If your driving puts you in situations where a girl walking in the road exposes you, then you are not driving safely. You should always be able to handle that situation, if you can't then you are going too fast.
This goes for any road, including highways, and any vehicle, including fully loaded semi trucks and bicycles, go-karts, whatever. The only situation in which this does not apply is in racing on closed tracks.
The law in most places agrees - if you had hit that girl then you would have been held liable.
Thats not to say the pedestrian wasn't acting recklessly, but considering the pedestrian was a child we can't really blame them. An adult should know better than putting themselves in front of a fast moving vehicle though. Most pedestrians involved in accidents could have avoided it by paying attention. It's generally the people who just walk out in front of moving cars that get hit by cars. A car hitting pedestrians on the side walk is much rarer.
I look both ways before crossing a one way street and I never walk into a pedestrian crossing until I am sure that the oncoming car is stopping. I realize that strategy doesn't work everywhere in the world, in Bangkok you pretty much just walk into traffic and hope that a few dozen motorists see and avoid you. But in many places cars will stop to let pedestrians cross.