Notwithstanding the provisions of subsection A of § 15.2-2000, every locality requiring curbs along its streets that incorporate accessible routes for pedestrian use, such as existing or proposed sidewalks, shall require that curb ramps be constructed at intersections for use by persons with mobility impairments. The ramps shall comply with the Virginia Department of Transportation’s Road and Bridge Standards. Local option, variance, or waiver of these standards is prohibited.