First and foremost, I have so much respect for our men and women of law enforcement, fire dept's, military, etc.
You just NEVER know when the next call is going to come that will be a matter of life or death. In this instance, after you watch the video, just think....if this officer would've been slowed down somewhere, for even 30 seconds, this could've ended very differently.
When Richmond, TX Officer Ramon Morales, who had only been on the job for about 10 months, got the call he flipped on his lights and that automatically turns on the dash cam, in turn capturing this incredibly scary, intense and, even a bit, shocking footage. Get more info here.
I wasn't able to find any official reason for why the woman was on the tracks. I have my theory and it's not a fun one.