I am new; how do I fix tradic?

https://preview.redd.it/3f189n8zu1ph1.png?width=1919&format=png&auto=webp&s=7e2aca904a45db2ad8afcce22b864c0028dfd7fd

I am using grids like I've seen people recommend for residential areas and such, but for some reason I always have traffic jams