Civil Geometry challenge??

It looks to be very easy to do. 

I have a number of “driftplaces” to design – it sounds like a perfect job to be done with Civil Cells.

 Unfortunately I can not layout simple geometry as marked in yellow on picture below. I tried to use line from element, line to element tools to create this tangent to arc and 45deg skewed to edge of pavement line – for some reason tangent snap is fadedout and can not be used with these tools. I did not succeed using other transition tools. Was trying with civil accudraw, but no effect as well.

 Any tip would be helpful.