Two ways I've seen:
1. Different assemblies at the curb cuts, letting the triangulation handle
the transition.
2. Profiles for each TIC that push the curb up and down.
Neither one is very much fun...
--
James Wedding, P.E.
Engineered Efficiency, Inc.
Civil 3D 2007
XP Tablet, SP2, 2GHz, 2G
www.eng-eff.com
www.civil3d.com