Crossing - stage 2

After dithering about how I wanted the sky to look for a couple of days I finally got my act together this morning and decided on a quiet evening sky with elongated clouds as I want this painting to have a peaceful, lonely atmosphere as a counterpoint to the strong composition. I have put the lightest part of the sky away from the railroad crossing as I don't want to over emphasise it against the sky and putting it nearer to the crossing makes it dominate the painting too much because of the contrast of dark against light.
This tonal underpainting stage used the same paint mix as yesterday thinned with Liquin and applied with a rag.