Obviously public transit is great for getting people around cities and is a very scalable traffic solution. One spinoff of a good public transit system is that the streets get safer. In Canada he number of collisions increases every year with the vast majority of these collisions the result of driver error. With public transit something else is happening and it’s thanks to the driver training and supportive infrastructure.
Instead of driving yourself, take transit. It might save your life.
Commuter trains, buses, streetcars, and subway trains are all safer forms of transit with much lower rates of injury and death than automobiles; they are heavier and stronger vehicles, they are larger and more visible, they often travel in their own right-of-ways, and (perhaps most importantly) they are operated by highly trained drivers.
All of these factors produce a much stronger safety record: these vehicles are less likely to be in a collision, and in the rare occasion that they are, their passengers are less likely to get hurt.
A September 2016 report from the American Public Transportation Association [PDF] argues that we need to start thinking about the role public transit can play in public safety.