The lights from the car is a nice detail, but something tells me that the sky can be way darker. Good luck!

I totally agree with wazowski. This looks like dusk at best. A snowy background is a good choice for maximum reflection of moonlight—except I see the (half) moon is in the background, so let me change my observation to 'mountains make for a dramatic silhouette with heightened star-light shadows thanks to the snow.' I think the rear vehicle's headlights could be stronger. And the angle on the front vehicle's headlights should be higher. More white in the headlight light would also be warranted IMO as would more feathering of the edge along the mountain ridge.

I think your source pic has a lot of potential and there's still lots of time to realize it. Note that the pole thing in the foreground needs to cast a shadow consistent with the primary light source.

thanks for your comments! I changed it up a bit. quick question though: what do IMO and feather mean? (sorry I'm a little new to this)

IMO - In My Opinion.
Feather - A technique to smooth the edges of an object.. or to reduce the hardness of the edges..

there we go. did some more editing. thanks for all the comments

This image reminds me of being up North in early September... it is quite light until very late ... this feels like it would be around 10-11PM!

Nice work ... it has improved from your first uploaded image... although it would be nice to have a Hi Res