Would need a parallels tools for lines or roads :
When using the duplicate tool, the lines are duplicated as this, XY coordinates can be set, but if the line containes curves or angles and we need to place with lines next to each other, they will not feet well and need to be reajusted all together, the final work is not very very good. if it could be done automatically just by setting the gap between them would be hundred time better, and also would save a lot of time.