Basic shapes

What is the best way to make a smooth transition line like the side of the ramp pic on this page? http://www.vertmfg.com/skateboard_ramps_streetspine.html

I need a good technique to lay it down and make the lines anti-alised and smooth. You could share me your way or point me to a tutorial, i'd like that very well

Yo, thank you

use the pen tool for sure
i have just the basic tuts for u here
http://www.heathrowe.com/tutorials.asp

b sure to look at the Shapes/Pen tuts

give a shout if they help ya

heathrowe