Question

What best describes a development that improved railroad safety?

Answer 1

Yes,you are right Air Breaks are the best answer.....

hope it helped.

Answer 2

First of all, you dont have the answers.

But the answer is "Companies replaced hand-operated brakes with air brakes on trains" is the best answer because this stopped many of the fatalities that were caused by brake failures." which is I say on what you are using D