I like the composition here, but the light was so blah. I can probably photoshop the lighting to bring life to the picture – is it worth the effort? I would need a brighter/bluer sky, and more saturated and vibrant colors on the bridge and the cars. …and maybe a little dehazing in the background.

I think bringing out the color and dehazing would help a bunch. But the road is gray and that would dominate the scene. Worth a try though.
Go for it! I do like the composition, so I think it’s worth trying.