You do not need to completely remove lights, just replace lights that are not important (lights that are not important and not strong) with geometry that has CoronaMTL with emission enabled. If you want lights there, then you should have them there :) Don't let renderer limit you. But use CoronaLights only for important key lights, that are strong.
By low blur value on bump maps i meant blur value which is in map nodes. It's default at 1.0. You should not use too low values like 0.01 in such scenes, because then texture detail can become smaller than pixel and cause fine noise that takes long to resolve, but this is especially important for animation, not as much for still images.
Your direct lighting now looks ok. The reflections are noisy because they are super strong. What is missing is some secondary photographic effect to make it look natural. That usually shows itself as glow or glares on photos.
But before you do that, you should first check if blurring on the textures the wet road is not too low on some of the bitmap nodes, and if bump mapping is not too strong. These could cause it to appear lot more noisy than it needs to be.
You can also now decrease GI/AA balance to 8 so that you have more AA going on which will resolve texture detail better :)
You can also put the glass back. Just make sure it does not have caustics enabled :)