Thank you spyke01 for this tutorial for circular streets. I was having problems to create proper circles.
I tried to make city according to the Venus Project city design. I had problem making accurate sicrcles.
In any way, I reccomend to try this city design - it is VERY practical.
Streets are not overcrowded, all services are easy accesible, lots of green surfaces, very ecological.
This city is small with 43 000 of people.