Curve direction at a specified station

Hi,
Via a Python script I would like to get the actual radius and curve direction of an alignment at a specified station. With the “GetInstantaneousRadius” method I got the radius, and I expected it with a + or - sign according to the direction (clockwise/counterclockwise), but all values are positive.
Do you know any method wich represents the actual curve direction?

Hi
Have you picture explain your idea

Sure!
Here is a test alignment, it consists of a clockwise curve, a straight section and a counterclockwise curve:

With the “GetInstantaneousRadius” method I generated a list for every single whole station, but based on just the result I cannot anticipate the direction of each curve. I expected a list in which the latter radius values are negative.

try
get PIPoints or Arc.CenterPoint or any point at center arc

and check by Alignment.StationOffsetByPoint