It's very possible that the artist who did the tweaked version you posted used plugins and got the effect in only a few mouse clicks, but reproducing it using only native PS tools can be tedious and you have to have a good eye to spot what's going on. Depending on the level of accuracy with which you want to reproduce this look, there are a lot of subtle efx put into the postprocessed version you posted that you would have to reproduce.
iDad picked up the most prominent efx. I did my own quick and dirty version which picked up some other efx, but missed others (eg, slight blurring of the trees, keeping the texture of the road sharp,etc.). I certainly am not going to work this to completion for a quick, freebie demo.
To do a really accurate job is going to take some time, as well as a familiarity with quite a few different basic photoshop skills. For example, after getting the overall color change in the right ball park, I had to burn and dodge areas, paint saturation in and out in other areas, blur in the "lighten" mode to soften areas, etc.
Since you asked the question, you are obviously in the process of learning the techniques. I would suggest that you work on them one at a time instead of jumping into the deep end of the pool trying to mimic an image that has many efx going on, all at once.
HTH,
Tom M