I think you should determine first what you want the primary subject of the picture to be. Is it going to be a picture of a tree, or a picture of the causeway? If it is of the tree, you have a couple of choices, enough light to 'see' the tree, or use it as a dark shape against a twilight sky. Depending on your choice, some foreground fill might work, or a composite to provide a brighter background plus the moving light streaks. Then you need to think about composition. The lone tree in the center really grabs your eye, and the boat dock on the left and trees on the right end up as distractions. The viewer ends up jumping back and forth from element to element, not 'flowing' through the scene.
If the 'subject' is the lights on the causeway, you may have a real problem. It ends up being pretty much as you have now,... one long sliver of light splitting the picture into two halves. It is so far away there isn't much of interest to see. In that case, the dark shape of the tree is more of an obstruction rather than an element to draw the attention of the viewer to the causeway.
I think the area has the potential for a good picture, but you need to decide in your mind what you want the result to be before selecting the spot from which to shoot.