Which of the following grade changes is generally considered acceptable when designing a sag or crest vertical point of intersection without a vertical curve?

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A 1% grade change is generally considered acceptable when designing sag or crest vertical point of intersection without a vertical curve when design speeds are < 45 miles per hour. For design speeds > 45 miles per hour, a grade change of 0.5% or less is generally acceptable. When grade changes are constructed without a specified vertical curve, the actual point of intersection is typically adjusted to be smooth in the field.

Which of the Following Grade Changes Is Generally Considered Acceptable