Supplemental Design

General Supplemental Design Standards

The following items have been approved by the SUDAS Board of Directors and are available for use. These items will be included in the 2024 Edition of the SUDAS Design Manual in December. Click on the topic title for the marked up version of the revision; click on the section reference for a clean version of the section that incorporates the change.

Errata and format revisions
Minor errors and formatting revisions.

Storm distribution for hydrograph routing (Sections 2A-4, 2B-4, and 2B-5)
Updated to new NRCS region-specific storm distributions.

Time of concentration (Section 2B-4, B, 1, b and 3, c)
Modified discussions on minimum time of concentration.

Complete streets (Sections 5C-1, 5C-2, 5M-1, 12A-1, 12A-2, 12A-4, 12A-5, 12B-1, 12B-2, 12B-3, 13A-3, and 13A-4)
An IHRB project to develop a DOT Complete Streets Policy proposed updates to several sections.  These changes are included in Chapter 5 (geometric tables and elements and complete streets), Chapter 12 (sidewalks, bicycles, pedestrians, and accessible traffic signals), and Chapter 13 (pedestrian elements in traffic signal design).

Erosion and sediment control regulatory requirements (Section 7B-1, B, 3 and C, 3)
Updated the regulatory elements to match the new NPDES General Permit No. 2 requirements, effective March 1, 2023.

Erosion and sediment control (Sections 7E-1, 7E-3, 7E-7, 7E-8, 7E-12, 7E-13, 7E-14, 7E-15, 7E-17, 7E-21, 7E-30, and 7E-31)
The SUDAS Erosion and Sediment Control Committee proposed various revisions to Chapter 7.

Page revised: June 15, 2023