Instructional Bulletins

Revised: August 11, 2025

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Roadway Design Guidelines Current Instructional Bulletins
IB Number Description         Signed  Date  
IB 25-09       Regarding Signatures on Title Sheet and Revised Roadway Design Guidelines for PDN Chapters 1 & 2 including updated CADD files 08/11/2025
IB 25-08 Regarding New and Revised Standard Drawings 07/31/2025
IB 25-07 Regarding Roadway Design Guidelines for PDN and Design Reference Documents 07/31/2025
IB 25-06 Regarding Signatures on Title Sheet 07/07/2025
IB 25-05 Regarding New and Revised Standard Drawings 04/30/2025
IB 25-04 Regarding Roadway Design Guidelines for PDN 04/30/2025
IB 25-03             
 Regarding Revised Turn-In Dates and Letting Schedule, Updated Title Sheet, Revised Roadway Design Guidelines -PDN Chapter 1, Updated ORD & MicroStation Sheet Files 02/27/2025
IB 25-02   Regarding New and Revised Standard Drawings 01/31/2025
IB 25-01              
 Regarding Roadway Design Guidelines for PDN 01/31/2025
IB 24-11 Regarding Turn-In Dates and Letting Schedule 10/31/2024
IB 24-10 Regarding Roadway Design Guidelines for PDN 10/31/2024
IB 24-09 
 Regarding New and Revised Standard Drawings 10/31/2024
IB 24-08 
 Regarding New and Revised Standard Drawings 07/31/2024
IB 24-07  Regarding Roadway Design Guidelines for PDN 07/31/2024
IB 24-06 Regarding Roadway Design Guidelines for PDN 05/31/2024
IB 24-05 Regarding Roadway Design Guidelines for PDN
 05/15/2024
IB 24-04 Regarding New Round Catch Basin Standard Drawings and Revisions to the Drainage Manual
 04/30/2024
IB 24-03 Regarding New and Revised Standard Drawings and PDN Design Guidelines Chapter 10
 03/28/2024
IB 24-02 Regarding Roadway Design Guidelines for PDN 02/06/2024
IB 24-01 Regarding Turn-In Dates and Letting Schedule 01/25/2024
B 23-12 Project Transitions to PDN 07/31/2023

This Page Last Updated: September 17, 2025 at 11:03 AM