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Active Design Memos

Active Design Memos

Active Design Memos

Design Memos are published between the first Monday and subsequent Thursday of each month. All revisions to the Design Manual described in these memos have been incorporated into the current Indiana Design Manual (IDM).

Memos appear on this page for a period of 1 year following the date of the memo. After 1 year, they are moved to the Archived Design Memos page.

Memos that include a recurring special provision (RSP) or recurring plan detail (RPD) remain on this page as long as the associated RSP/RPD remains active. Superseded memos are archived immediately.

The practice of distinguishing policy memos from techncial advisories was discontinued January 2018.

This Page Last Updated 11/15/2022

Memo Number Memo Date Subject Affected IDM Section Effective Date
22-23 11/10/22 Engineering Assessment Manual Revisions N/A Stage 1 Submittals on or after February 1, 2022
22-22 11/10/22 Post-construction Stormwater Management IDM Chapter 204 As Noted
22-21 10/07/22 Deck Pour Sequence for Prestressed Beam Superstructures IDM Chapter 404-2.06(02) & Figure 404-2F Stage 3 submittals on or after November 1st, 2022
22-20 10/06/22 Surface Seal for Concrete Structural Members IDM Chapter 17-5.01(03) Stage 3 submittals on or after November 1st, 2022
22-19 09/13/22 Welded Wire Reinforcement (WWR), Lightweight Concrete, and Continuity for Prestressed Beams IDM Chapter 406, 406-4.02, 406-4.03, 406-4.04, 406-5.01, 406-10.0, 406-12.02(01), 406-12.02(02), 406-12.02(03), 406-12.03(01), 406- 12.03(03), 406-12.04(02), 40612.05, 406-12.06, 406-12.08, 406-12.09, Figures 406-12B (del.), 406-12C (new), 406-13A thru 406-13D (rev.), 406-14A thru 406- 14Z (deleted, content revised and consolidated into new figures 406-14AA thru 406-14EE) Stage 3 submittals on or after January 1st, 2023
22-18 09/13/22 Chemical Anchors for Post-Installed Reinforcement IDM Chapter 412, 412-3.01(08), 412-3.03(02), and Figure 412-3B (del.) Immediately
22-17 09/13/22 AASHTO LRFD Bridge Design Specifications N/A Stage 2 submittals on or after March 1, 2023
22-16 08/04/22 Intelligent Transportation Systems (ITS) Update IDM Chapter 502, Section 502-5.0, Figures 502-5A thru 502-5F deleted Stage 3 submittals on or after September 1st, 2022
22-15 07/26/22 INDOT 2022 Standard Drawings N/A Lettings on or after September 1, 2022
22-14 Rev. 07/15/22 rev. 09/09/22 Liquid Asphalt Sealant for Milled HMA Corrugations N/A Contract Lettings on or after November 1, 2022
22-13 07/07/22 Working Drawings for Precast 3-sided Structures and Box Culverts N/A Lettings on or after August 1, 2022
22-12 07/07/22 Subgrade Treatment for Full Depth Patching IDM Chapter 603 Sections 603-3.01 and 603-3.04 Contract Lettings on or after November 1, 2022
22-11 07/07/22 Pre-Bid Meeting Information N/A Lettings on or after October 1, 2022
22-10 07/07/22 INDOT Lighting Policy IDM Chapter 502 Sections 502-4.01(03),502-4.01(04) and 502-4.02,502-4.02(01) thru 502-4.02(14) (deleted) Stage 1 Plan Submittals on or after July 1, 2022
22-09 06/06/22 Revisions to Reinforced-Concrete Structure IDM Chapter 405, 405-1.02 thru 405-1.07,
405-2.0 thru 405-2.05, 405-2.06(01), 405-2.06(03),
405-2.07(01) thru 405-2.07(04), 405-2.08 thru 405-2.10,
405-2.11 thru 405-2.13, 405-3.0 thru 405-3.01(05), and 405-3.02 thru 405-3.14,

Figures 405-1A , and Figure 405-2C (revised), and
Figures 405-1B, 401-1C, 405-2D thru 405-2Y (deleted)
Immediately
22-08 04/20/22 Revisions to Hydraulics Submittal Process and Editable Documents IDM Chapter 203 Section 203-2.04(04) and 203-3.06, Figures 203-2L and 203-3C (deleted) Immediately
22-07 04/20/22 Revisions to Letting Preparation Schedule N/A Lettings on or after December 7, 2022
22-06 04/20/22 Revisions to Maintenance of Traffic Standards N/A Lettings on or after September 1, 2022
22-05 04/20/22 Concrete Median Barrier for Interstate Routes N/A Immediately
22-04 02/09/22 Payment Revisions of Construction-Zone Energy-Absorbing Terminals and Temporary Traffic Barriers IDM Chapter 17, Section 17-4.13 Lettings on or after June 1, 2022
22-03 01/21/22 Pavement Design for Small Structure and Bridge Projects IDM Chapter 601, Sections 601-5.03 (new), 601-6.0, IDM Chapter 605, Sections 605-1.09 thru 605-1.13 (deleted), Figure 601-5C (new), and 17-5.09(01) Lettings on or after July 1, 2022
22-02 01/21/22 Life-Cycle Pavment Cost Analysis (LCPCA) Update IDM Chapter 601, Section 601-5.01(04), IDM Chapter 606, Sections 606-1.0, 606-2.02, 606-2.04, 606-2.06, 606-3.01, and 606-3.02 Lettings on or after May 1, 2022
22-01 01/06/22 Stage 2 Documents for Publication IDM Chapter 14, Sections 14-2.01(07), 14-2.04(06), 14-2.05(03), 14-2.06(02),
14-2.07(02), and 14-2.08(02)
Stage 2 Plans on or after January 06, 2022
Memo Number Memo Date Subject Affected IDM Section Effective Date
21-25 12/30/21 Mechanically Stabilized Earth (MSE) Walls IDM Chapter 14, Sections 14-2.01(07), 14-2.01(12), 14-2.04(06), 14-2.04(09), 14-2.05(05)

IDM Chapter 17, Figure 17-5C

IDM Chapter 402, Section 402-6.02(02)

IDM Chapter 409, Figure 409-2G

IDM Chapter 410, Section 410-5.01(06) and Figure 410-5(O)C

Editable Document: MSE Wall Design Review Checklist

Lettings on or after December 30,2021
21-24 12/09/21 Pavement Markings IDM Chapter 502, Sections 502-2.01(03) New, 502-2.01(04) thru 502-2.01(08), 502-2.02(01) thru 502-2.02(04), 502-2.02(06) thru 502-2.02(07), 502-2.02(12), 502-2.02(16), 502-2.02(17), 502-2.02(21), 502-2.06(04), 502-2.06(05), 502-2.09(02), 502-2.09(03), 502-2.10, and 502-2.11, Figures 502-2A, 502-2B, 502-2C, 502-2D, and 502-2Q Lettings on or after July 1, 2022
21-23 09/28/21 Letting Preparation Schedule N/A Lettings on or after December 7,2022
21-22 09/14/21 Pay Item Revision of Geotextile for Subgrade N/A Lettings on or after March 9, 2022
21-21 11/02/21 Bridge Preventive Maintenance Criteria Figure 412-1A Start Plan Development Date on or after November 2, 2021
21-20 09/09/21 Spray Paver Use with HMA/SMA IDM Chapter 17, Sections 17-4.01(01), and Figure 17-4A, and IDM Chapter 607, Sections 607-1.04 and 607-1.05 Lettings on or after September 1, 2022
21-19 09/09/21 Historic Bridge Review Submittals IDM Chapter 14, Sections 14-2.01(09), 14-2.05, 14-2.05(03) thru 14-2.05(07), and IDM Chapter 412, Sections 412-5.01(02) and 412-5.02 Immediately
21-18 Rev. 09/09/21 rev. 02/09/22 Scour Requirements for Bridge Preventive Maintenance Projects IDM Chapter 14, Sections 14-2.05, 412-2.0, and Figure 412-2C(Rev.) Stage 1 Submittals on or after October 1, 2021
21-17 06/17/21 Indiana Design Manual Updates for Unique Special Provisions IDM Chapter 14, Sections 14-1.02, 14-2.01, 14-2.03 thru 14-2.08, Figure 14-1K(Rev.), and Figure 14-1L(Del.)
IDM Chapter 19, Section 19-2.01, 19-2.03, 19-3.02, 19-3.02(01) thru 19-3.02(04), and Figure 19-3D(Rev.)
Immediately
21-15 04/12/21 INDOT 2021 Standard Drawings N/A Lettings on or after September 1, 2021
21-10 04/12/21 Zipper Merges for Transportation Operations Plans IDM Chapter 503, Section 503-4.02 Lettings on or after September 1, 2021
21-09 04/12/21 Cement Stabilized Subgrade Soils IDM Chapter 17, Section 17-4.02(02) thru 17-4.02 (04) Lettings on or after June 1, 2021
21-08 Rev. 03/11/21 rev. 10/25/21 Indiana Design Manual Chapter 14 Updates: Addition of TMP Submittal Items for Significant Projects and MOT Submittal Changes IDM Chapter 14 and Editable Document 103-02-02 Stage 1 Submittal Date on or after August 1, 2021
21-05 03/11/21 Traffic Management for Design Projects N/A Stage 1 Submittals on or after August 1, 2021
21-04 03/11/21 Full Depth Reclamation (FDR) Projects and Rule 5 Permits N/A Immediately
21-03 03/11/21 Indiana Design Manual Chapters 104 & 105 Rewrite Indiana Design Manual Chapter 104, Utility Coordination & Chapter 105 Railroad Coordination, Figure 105-1A (deleted) Immediately
21-01 01/07/21 Longitudinal Joint Options and D-1 Contraction Joint Spacing Figure 602-3Z Lettings on or after June 1, 2021
Memo Number Memo Date Subject Affected IDM Section Effective Date
20-23 10/08/20 Field Office Type and Telephone Service 20-2.03 and Editable Document 14-1C Contracts letting on or after March 10, 2021
20-22 10/08/20 Mass Concrete 405-1.08 and Figure 405-1D Stage 3 Submittal on or after October 8, 2020
20-20 10/08/20 Accessible Pedestrian Signal (APS) Studies, Pedestrian Push Buttons, and Curb Ramps 51-1.06(01), 51-1.06(02), 51-1.06(03), 502-3.03(05), and 502-3.04(05) Projects Letting on or after March 10, 2021
20-19 09/10/20 Deleted Figure Placeholder Removal & Editable Documents Naming Conventions N/A Immediately
20-18 Rev. 09/10/20 rev. 01/07/2021 Shop Drawing and Falsework Review Procedure 14-1.02(08) Immediately, MSE Wall Shop Drawing Review Checklist required for shop drawings submitted for review on or after May 1, 2021
20-16 09/10/20 Proprietary Materials 17-1.05(01), 17-1.05(02), and Editable Documents in Proprietary Material Category As noted
20-15 09/10/20 Pavement Project Categories 602-1.0, 602-1.03(08), 602-1.04(02), 602-1.04(08), 602-1.04(09), Figures 602-1B and 602-1C Immediately
20-14 08/06/20 Preventative Maintenance and 3R Design Criteria for Freeway and Interstate Resurfacing Projects
Attachment: August 2020 Q&A for Design Memos 20-13 & 20-14
N/A Immediately
20-13 08/06/20 rev. 10/08/20 Level One Controlling Criteria
Attachment: August 2020 Q&A for Design Memos 20-13 & 20-14
N/A Immediately
20-12 08/06/20 Truck Mounted Attenuators 503-3.05(04) Lettings on or after December 1, 2020
20-11 08/06/20 Elastomeric Bearing Pads 409-7.03(03), 409-7.04, 409-7.05, Figures 409-7F, 409-7J, 409-7K (deleted), 409-7L, and 409-7M Stage 3 Submittal on or after August 6, 2020
20-10 07/06/20 Seed Mix & Mulching Updates 17-4.10, 17-4.10(01) thru 17-4.10(04), and 17-4.10(06) thru 17-4.10(08) Immediately
20-09 05/18/20 INDOT 2020 Standard Drawings N/A Lettings on or after September 1, 2020
20-05 Rev. 04/13/20 rev. 04/16/20 Stormwater Management 14-2.01(07), 14-2.03(03), 14-2.04(06), and 14-2.05(03) As Noted
20-04 04/13/20 Subgrade Treatment 17-4.02 Lettings on or after September 1, 2020
20-03 Rev. 04/13/20 rev. 07/06/20 Bridge Painting 17-5.11, 412-3.03(06), Figures 17-5K and 17-5L Lettings on or after June 1, 2020 rev. Stage 3 Submittal on or after July 6, 2020
20-02 01/07/20 Ramp Maximum Grade 48-5.04(01) Stage 3 submittal on or after January 7, 2020
20-01 01/07/20 Pavement Design -Indiana Design Manual reorganization Chapter 304 Pavement Design Approval on or after January 7, 2020
Memo Number Memo Date Subject Affected IDM Section Effective Date
19-11 10/10/19 Proprietary Materials N/A N/A
19-10 09/05/19 Terminal Joints 17-5.09(01), 402-7.02(03), and 409-2.04 Lettings on or after March 1, 2020
19-08 Rev. 09/05/19 rev. 10/23/19 Bridge Railing 404-4.0 Stage 3 Submittal on or after September 5, 2019
Memo Number Memo Date Subject Affected IDM Section Effective Date
18-26 11/08/18 Pedestrian Pushbutton and ADA Plan Details 51-1.06(03) Stage 3 Submittal on or after March 1, 2019
18-25 11/08/18 Engineering Assessment Manual N/A As noted
18-21 08/06/18 Bundling HMA Quantities N/A Lettings on or after
December 1, 2018
18-20 08/06/18 Bridge Aesthetics Policy N/A Immediately
18-17 Rev. 08/06/18 rev. 08/08/18 rev. 05/06/19 Bridge Deck Overlays N/A Lettings on or after
September 1, 2019
18-14 08/06/18 Hydraulic Memo Templates N/A

Hydraulic Submittals on or after
August 1, 2018
18-12 06/04/18 Office of Hydraulics Review for LPA Projects N/A

Lettings on or after July 1, 2018

18-11 05/09/18 Pedestrian Crossing Treatment RRFB Figure 51-7 O Immediately
18-08 rev. 05/09/18 rev. 05/16/18 Geotechnical Waivers and Investigations for LPA Projects N/A

Immediately

18-06 03/05/18 Development of FDR Pavement Projects as Partial 3R 304-6.01 thru 304-6.03

Immediately

18-05 03/05/18 Plan Note for TAC Approved ADA Inquiries N/A Stage 3 Submissions on or after April 2, 2018
Memo Number Memo Date Subject Affected IDM Section Effective Date
17-28 12/04/17 Plant Growth Layer N/A

Lettings on or after March 1, 2018

17-27 12/04/17 Bridge-Length Culverts N/A Immediately
17-23 rev. 10/02/17 rev. 02/05/18 AASHTO LRFD Bridge Design Specifications N/A

Stage 2 Submission on or after August 1, 2018

17-20 09/05/17 Complex Bridge Design Requirements N/A

Immediately

17-19 09/05/17 Next Level Signs
Attachment: Signs
N/A Select Projects with Lettings on or after January 1, 2018
17-18 08/07/17 Use of Geotextile in Geotechnical Applications N/A

Lettings on or after
September 1, 2017

17-17 08/07/17 Manual for Assessing Safety Hardware (MASH) and New
W-beam Guardrail and Guardrail End Treatment Standards
Attachment: Pay Items Associated with MGS W-Beam Guardrail and Related Systems
N/A NHS Routes: Letting on or after January 1, 2018
Non-NHS Routes: Letting on or after July 1, 2018
17-16 08/07/17 Permanent Metal Forms
Attachment: Sections 404-2.02(02), 404-2.02(03), 404-2.03(02), Figures 404-2B and 404-2C
404-2.02, 404-2.03, Fig. 404-2B and 404-2C

Lettings on or after
September 1, 2017

17-10 05/11/17 Manual for Assessing Safety Hardware (MASH) and New W-beam Guardrail and Guardrail End Treatment Standards
Attachment: Midwest Guardrail System Assembly Figures, AASHTO/FHWA Joint Implementation Agreegement for MASH Memo
N/A

NHS Routes: Letting on or after January 1, 2018
Non-NHS Routes: Letting on or after July 1, 2018

17-04 03/16/17 Culvert Asset ID Number
Attachment: Culvert Asset ID Numbering System
N/A Stage 3 on or after May 2017
17-02 02/02/17 Rural Interstate Shoulder Width N/A Immediately
Memo Number Memo Date Subject Affected IDM Section Effective Date
16-35 11/21/16 Undistributed Quantities N/A Immediately
16-16 04/11/16 Quantities
Attachments: Section 17-1.05, Section 17-4.06, Sections 17-4.09 thru 17-4.10(03), Section 17-5.09, Section 17-6.0, Figures 17-5G thru -5G(02), 17-4D, 17-5I, 17-5J

As Noted Sections 17-1.05, 17-4.06, 17-4.09 thru 17-4.10(03), 17-5.09, 17-6.0, Figures 17-5G thru -5G(02), 17-4D, 17-5I, 17-5J
16-10 03/16/16 NEPA Compliance and Waterway Permitting for Bundled Projects
Attachment: INDOT Environmental Memo

N/A Immediately
16-01 01/05/16 Structure Number in ERMS, SPMS, and on Plans
Attachment: Example

N/A Immediately
Memo Number Memo Date Subject Affected IDM Section Effective Date
15-11 05/01/15 Anchored Temporary Concrete Barrier N/A Letting on or after May 1, 2015
15-08 04/07/15 Title Sheet Signatures for Local Public Agency (LPA) Projects N/A Letting on or after August 5, 2015
Memo Number Memo Date Subject Affected IDM Section Effective Date
14-10 07/01/14 Practical Design 40-8.01, 40-8.04(01), Chapter 53, 55-3.0, 55-4.01(03), Figures 40-8B, 53-1 through 53-9, 55-3A through 55-3H Immediately
14-05 04/02/14 Policy and Procedure for Determination of Technical Infeasibility
Attachment: Policy and Procedure for Determination of Technical Infeasibility
N/A Immediately
Memo Number Memo Date Subject Affected IDM Section Effective Date
13-10 04/15/13 Roundabouts
Attachment: Roundabout Design Checklist
51-12.0 Immediately
13-09 04/12/13 Small Structure Replacement, Guardrail Runout Length
Attachment: RDG Table 5-10(b)
Chapters 49 & 55 Preliminary Field Check on or after June 1, 2013 and as noted
Memo Number Memo Date Subject Affected IDM Section Effective Date
12-21 10/05/12 Use of AASHTO LRFD Bridge Design Specifications 409-9.0 Stage 2 Submission on or after 12/21/12
Memo Number Memo Date Subject Affected IDM Section Effective Date
11-12 07/08/11 Metric-Units Plans See Memo Immediately
11-09 04/05/11 High-Tension Cable-Barrier System (CBS)
Attachment: RSP 627-R-546 Attachment: RPD 627-R-546d
49-5.01(04) Lettings on or after May 11, 2011
Memo Number Memo Date Subject Affected IDM Section Effective Date
05-34 11/9/05 Concrete Railings & Moment Slabs at Mechanically Stabilized Earth (MSE) Wall Systems
Attachment: 706-R-504 RSP & RPD
49-4.01(05) 02/15/10
Memo Number Memo Date Subject Affected IDM Section Effective Date
03-07 07/02/03 Policy for Context Sensitive Solution N/A Immediately
Memo Number Memo Date Subject Affected IDM Section Effective Date
01-14 12/10/01 Water Main & Sanitary Sewer Construction in Contracts N/A Immediately

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