Greetings from the Critique Club!
First let me say I've enjoyed looking at this image. It's a interesting and lovely part of the world to travel in. I look at those 'monuments' and can't help but wonder how long they've been there and what did this place look like 1,000 or 20,000 years ago.
As for the image particulars; it's a well contemplated composition with a nicely balanced scene. The road lends a leading line element into the valley in a good way, although with an abrupt ending.
That ending begs the question; what was going on down there? The red tail lights are moving so well and then end in a smudgy blur. Did the vehicle stop? Was it full of tourists stopping for a photo op? The lights could have stopped for any variety of other reasons I suppose - will we ever know? For me, this piece of the image is a large part of the story. The scenery is still beautiful, yes, but the intrigue is in those red lights.
Now for the challenge theme. The 'light' in this case appears to actually be the tail lights. Yes / No? I say that as the title implies it with 'Last trip'. However, when I read the photographers comments you mention trying to capture the last bit of light on top of the rocks. So, the car was a happy bonus? :-)
All of the above banter aside, this was again, a very strongly contested challenge with some very good images gracing the front page. I think most viewers / voters were expecting 'light' to play a stronger role in the image subject context (as least I was) and honestly, I think this image did quite well overall given the competition.
I've enjoyed spending some time with your photo. Look forward to seeing more of your work in the future.