Center Line Profile (Tip #2149) from Pedro Ferreira creates a profile detail with given contours and a centerline to follow. This utility is exceptionally powerful in highway design for which it was created. A sample drawing to test with is also provided. Load the sample contour and center line drawing, then load the AutoLISP program. Activate the program by typing QP at the Command prompt. The program needs three basic inputs: the name of a layer where the contours are stored, the entity representing the centerline and the vertical exaggeration factor to use when drawing the profile detail. The contours should be polylines, splines and lines drawn at the proper elevation. The center line should be a lightweight polyline. This is an extreme powertool for civil engineers involved in highway and bridge design!