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Vehicles bottoming on grade changes

Vehicles bottoming on grade changes

Vehicles bottoming on grade changes

(OP)
I had littel response in the traffic forum, so I thought I'd try here.

NYSDOT used to have a template for checking whether vehicles would bottom out at driveway or intersection entrances, but it appears to have been deleted.

A consultant designing a road reconstruction project is proposing an intersection with a 7.5% crest change of grade w/o a vertical curve (uphill approach on the outside of a superelevated curve), and another with a 13% sag change of grade (downhill approach on the inside of a superelevated curve).

I suspect vehicles will be scarring our beautiful new pavement, but need help proving it. Any suggestions?

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     "...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail."

              Wm. Phelps Eno, ca. 1928

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