officer kenneth elkins: being a police officer changes your entire lifestyle. in tennessee, as in probably several other states police officers are never off duty. the law says we have to act under penalty of law in case of an emergency or a felony situation. if you go out with friends you always hear that line-- "oh, be careful. the police are here." that gets kind of boring but it's more than just a job sometimes. it's actually a lifestyle that you have to adapt and adopt. we've got a vehicle parked between railroad tracks off the main highway. it almost looks like she's on a line. she is parked on a line. she drove her car down the railroad tracks and got both wheels off the ground on the tracks right there. okay. uh, 34. make it 35. please stay off the railroad tracks on fourth avenue south. we've got a woman stuck. she's driven her car up the railroad tracks and she's wedged between two main lines. call c.s.x. advise them to stop all railroad traffic or we'll end up with a mess. 10-4. what happened? woman: i don't know what happened. i was just driving alo