Spectra Precision FAST Survey Reference Manual - Manual (Page 249)

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right side pivots to “reverse crown”, where the slope is the same across the template and (3) both the right and left sides
pivot from the hinge point (centerline) into full super. All of these key pivot points are entered in the superelevation
dialog.
You enter all these key stations (begin, flat outside lane, reverse crown, full super) both going up to full super and
transitioning back down to normal crown. Recognizing that the normal crown of -2% transitions from station 100
through a slope of 5%, the transition is 1% per 100 feet, assuming an even rate of transition. Therefore, a “flat” outside
slope occurs at station 300, reverse crown at station 500 and full super at station 600, as shown. You will need to
compute these stations in advance. These intermediate stations are entered in the superelevation dialog to allow for
different rates of transition from normal crown to flat to reverse crown to full super. Normally, the rates of transition are
consistent. Note that super left or right is always entered as a positive percent slope — the road centerline curve
direction will control the direction of pivot. You are now ready to click Add and enter in Curve 1.
When you click OK, the first line of the superelevation dialog is filled in. Curve 1 is complete. Next, we enter Curve 2
as follows, using similar logic.