2.17 Vertical Alignment and Street Grades
a. Street grades shall be designed to allow drainage to the curb of areas within the public right-of-way, as well as lot drainage in accordance with approved pavement section.
b. Unless otherwise approved in writing by the Director and applicable City planning authorities, street grades shall not exceed the following:
1) Arterials 7%
2) Collectors 10%
3) All others 10% except as noted below
12% maximum, with 12% grades not exceeding 200 feet in length and not at intersections.
4) Notwithstanding these maximum street grades, street grades through intersections and intersection approaches must allow for the installation of pedestrian ramps & pedestrian crossings conforming to PROWAG standards.
c. Minimum tangent street gradients shall be 0.5% along the crown and curb for all streets (Type A curb & gutter required).
d. Streets intersecting with streets not constructed to full City standards shall be designed to match both present and future vertical alignments of the intersected street. The requirements of these standards shall be met for both present and future conditions.
e. Street grades, intersections and super-elevation transitions shall be designed to not allow concentrations of stormwater to flow across travel lanes.
f. Slope easements shall be dedicated or obtained for the purposes of grading outside of the right-of-way or to ensure that roadway fill slopes are not disturbed.