While making intersections, there were a few things that I found needed/missing:
http://img39.imageshack.us/img39/2078/example1f.jpg
A one-way-road onramp to elevated highway, but now with 2 lanes
http://img8.imageshack.us/img8/8151/example2d.jpg
Elevated RHW to Elevated Highway (2 lanes -->3 lanes)
http://img8.imageshack.us/img8/9119/example3c.jpg
Elevated RHW to Elevated Highway (2 lanes +onramp -->3 lanes)
Are those possible to make? Or have they perhaps already been made?
Anyway, I would really like to see those in Simcity 4. (pictures made with paint )