Backlit sun with a bit of warmth. A washed out/out of focus background visible outside of train could be added in post production.
This is an example of how we could shoot if we really want to play up the warm lighting streaming through window.
For the symmetrical shot, we won't see a window in the cropped in image, so we will need other visual clues. We can go for a lighter, more airy feel, and a brighter background.
If we want to be even more aggressive, a warm backlight can suggest sunlight streaming in, reflecting in the rear of the car and highlighting our heroes shoulders and hair.
The shot notes for the Subway call for "bland and dreary" lighting. We can shoot a straightforward flat light, or we could consider exagerating it even more with some slight desturation in post production.
Another general reference for how we can approach lighting on wide shot for subway.
Street Shot/Inset lighting
Lighting for the inset street image can suggest a crisp morning or sunny afternoon.
We will shoot the street under a variety of lighting conditions, starting at about 45 minutes prior to sunset. We can further tune the image with different options for color grading in post.