Hi RJ,
I work with a consulting firm in Winter Haven, Florida. Here is a list of a few program packages we utilize most often; 1) AutoCAD 2004 with Autodesk Land Development Desktop, Civil Design and Survey; 2) Autoturn; 3) the suite of Haestad Methods Civil Engineering Software; 4)ICPR II and...
I agree with the 1% rule BUSSP listed if your talking about longitudinal grade changes and not grade changes associated with an inverted crown section utilized to convey storm water.