Counter slope

an overhanging slope; as, a wall with a counter slope.
- Tooke.

See also: Counter

References in periodicals archive ?
Clearly, an excessive counter slope of the gutter makes it difficult for a person in a wheelchair to maintain the momentum needed to move across the slope of the gutter and onto the running slope of the curb ramp.
* Counter slopes of adjoining gutters and road surfaces immediately adjacent to the curb ramp not be steeper than 1:20