We can take the LEO's that would have patrolled highways/city streets and have them patrol on public transport, same job just slightly different environment.
Can I ask why you feel that public transit is unsafe in the US?
Because each of these perps were not on their first, second, third, fourth, fifth, or sixth violent offense and were freely out to kill:
https://en.wikipedia.org/wiki/Killing_of_Debrina_Kawam
https://en.wikipedia.org/wiki/Killing_of_Iryna_Zarutska
https://www.cbsnews.com/newyork/news/nypd-men-pushed-subway-...
Many more such cases occur and aren’t widely reported. I’ve personally witnessed a stabbing on a bus
My chances of being stabbed inside my car are much lower
Because each of these perps were not on their first, second, third, fourth, fifth, or sixth violent offense and were freely out to kill:
https://en.wikipedia.org/wiki/Killing_of_Debrina_Kawam
https://en.wikipedia.org/wiki/Killing_of_Iryna_Zarutska
https://www.cbsnews.com/newyork/news/nypd-men-pushed-subway-...
Many more such cases occur and aren’t widely reported. I’ve personally witnessed a stabbing on a bus
My chances of being stabbed inside my car are much lower