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?
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




