What WAS that thing at the end???
The last few frames. . . of Watts in the car with her daughter. . . the camera lingered on something that looked strange with a light? on the right of the screen and something that looked like a window shutter on the left. The frame was black, white, and grey, and I couldn't figure out what the heck it was. The very next frame (I think) was the green signal. Why did the camera linger in that particular thing whatever it was, and what WAS it? Apparently it was something important or the camera wouldn't have stayed there.
SPOILERS*********
I know this has been partially covered, if Watts' character was going to kill herself and her daughter on the train tracks wouldn't we have heard the train blowing its horn??? She seemed to be the one who was suffering the most from the ending of the relationships, but I don't think she would have killed her daughter.