If you have access to Standard or Advanced license, you can use Representations (Understanding representations—Help | ArcGIS Desktop ) to solve this problem:
You will have to indicate that you want to merge the roads in the Symbol Levels:
And you will have to set the Caps to Round (twice):
Hi Xander,
thank you very much for your fast and detailed response. It looks neater than before. However, I was thinking of something like this:
Apologize, I am cartographer from the last millenium...
Christiane
Hi Christiane Enderle , that indeed looks better that what I produced with the symbol levels and representations. Not sure if this can be achieved. Would be great if a real cartographer from Esri jumps in...