Hi,
When we draw using the 'Spiral arc Spiral' command between Alignment and Radius, it does not become tangent.
You're welcome!
It appears to be Tangent just not where you are pointing and possible not where you expect but still tangent. You have an Arc - Spiral - Arc -Tang set of geometry lines. Are you specifying the Spiral Length? The specified spiral (Transition Length) would move that Tangent Point.
Mike LongstreetVermont Agency of TransportationCivil Engineering Technical SupportVTCAD Help
The values are as shown in the picture.
The clothoid is shifting inward in the area marked in red.
Thank you, have a good day!