this picture is a bit sketchy, any tips on how to improve it?

Tough thing to do - to fix it. Under the trees is overexposed. The foreground trees looks soft.

What are the details - use tripod?, shutter, lens, fstop

If reshooting I would use a nd grad filter upside down or the flash. The biggest challenge is that under the trees is overexposed but exposing less will underexpose the leaves. Thus a flash with a lower exposure might help or the upside down nd grad.

Softness on trees either suggests a slow shutter hand held or need for higher fstop.

I played with it in photoshop but was not able to solve the overexposure below tree because it was so severe.

Converting to b/w helps a bit but still looks to overexposed under trees.

^thanks for the advice, I will definetly try using flash next time.
Wow, haha, I dont think I can do a slow shutter hand held, I can barely hold a 3 or 4 - shaky hands.
I was mainly trying to get a light trail of the cars, not really worrying about exposure and such, but this was the best shot I got out of the series I took, but still a bit sketchy.

My first question was what you were trying to accomplish with the picture.

If it's the light trails of the cars, try a new composition that emphasizes those. I would try to find a dark background that they will show up well against. For example, you could show from above so that they are against the dark pavement, or you could find a long dark colored wall that isn't lit, and shoot them against that. With this shot, in order to have a long enough exposure for the car lights, you end up with a really bright background that the lights disappear in (I didn't really even notice they were there until your second post where you said that you were trying to show them).