How to create routes which follow the line directions?

[WilsonWan]

I exported 100 polylines from autocad and all of them have directions. When I create routes from them, their direction are re-defined. I think it is because coordinate priority changes the polyline directions. Is there any method I can keep the line direction?

Thanks.

[JohannesLindner]

 I think it is because coordinate priority changes the polyline directions

Correct.

Is there any method I can keep the line direction?

Calculate 2 new fields:

set FROM to 0

set TO to ShapeLength

In the Create Routes tool, change the Measure Source to "Values from two fields", use the fields you just created.