Avoid kinks

Obviously your transition (chlotoid) should have R=infinity (0 curvature) at line and R=Rarc (curvature 1/Rarc) at arc, where Rarc is the radius of arc.

Obviously your transition (chlotoid) should have R=infinity (0 curvature) at line and R=Rarc (curvature 1/Rarc) at arc, where Rarc is the radius of arc.

Thank you for your reply.

I have tried constructing the clothoid with 'Multiple Element Regression Analysis',keeping the length free. But the clothoid is not closed on the arc side which is why I manually edited the direction of clothoid in order to make sure it closes on both sides with an angle 180 degrees, and I ended up getting this error 'non collinear'.  Is there anything that I am missing while constructing a clothoid?

Thank you in advance. 

Best Regards,

Divya

Thank you for your reply.

I have tried constructing the clothoid with 'Multiple Element Regression Analysis',keeping the length free. But the clothoid is not closed on the arc side which is why I manually edited the direction of clothoid in order to make sure it closes on both sides with an angle 180 degrees, and I ended up getting this error 'non collinear'.  Is there anything that I am missing while constructing a clothoid?

Thank you in advance. 

Best Regards,

Divya

Can you please post a screenshot of what you are trying to achieve?

What type of project it is? Highway/Rail?

New, rehabilitation?

There is only one transition, from which we pick an arc which we scale with a parameter.

For a chlotoid to transition between 2 elements with a given parameter you need a certain offset, otherwise you will end with your situation.

Regards,

Val.