Traffic Operations Division Instructional and Informational Memoranda
Work Zone Safety | HSIP Application/Procedure update | MUTCD and Virginia Supplement
VDOT Governance Documents
Listed below are the current VDOT Traffic Operations Instructional and Informational Memoranda (IIMs). A list of revised and voided memoranda is also available on this website.
In fall 2022, the former Traffic Engineering and Operations Divisions merged to form “Traffic Operations Division” (TOD), with some functions of the former Operations Divisions being transferred to a new “Operations Technology Division.”
This webpage lists all IIMs that are under the purview of TOD.
Given the longstanding application of these IIMs and their reference in many agency documentation, TOD will retain existing IIM numbers and will use two numbering schemes, listed in Tables 1 and 2 below. Existing IIMs are subject to renumbering if/when they are next updated.
- Table 1 lists IIMs issued under the former Traffic Engineering Division (TED), as well as IIMs issued after fall 2022 generally relating to highway safety, planning & performance, corridor management, engineering management and delivery functional areas.
- Table 2 lists IIMs issued under the former Operations Division (OD), as well as IIMs issued after fall 2022 generally relating to incident management and highway operations.
- Note: some IIMs previously issued under the Operations Division may now be maintained by the Operations Technology Division and may not be listed below.
Contact Traffic Operations Division at [email protected] with any questions on TOD IIMs.
Table 1 – IIMs issued under former TED; Safety, Planning & Performance, Corridor Management, Engineering Management and Delivery IIMs
|
Number |
Subject |
Last Revised |
Cross-Reference |
|
Reporting Changes Affecting Highway-Rail Grade Crossing Inventory Data |
September 2018 |
|
|
|
Establishment, Operation, and Maintenance of School Zone Speed Limits (SZSLs) |
March 2016 |
|
|
|
Dry Fire Hydrants Signing |
August 1994 |
|
|
|
Type B, Class VI Pavement Markings |
June 2014 |
|
|
|
Memorial/Dedication Signs for Bridges, Highways, and Highway Segments |
December 2014 |
|
|
|
Watch for Children Signs |
October 2014 |
|
|
|
Parking for Disabled Person(s) |
January 2015 |
|
|
|
Proposed Roadway Improvement Sign |
August 2016 |
|
|
|
Yellow Change Intervals and Red Clearance Intervals |
January 2013 |
|
|
|
Low-Ground Clearance Highway Rail Grade Crossing Sign (W10-5) |
August 2016 |
|
|
|
Engine Braking and Other Noise Restriction Signs |
August 2016 |
|
|
|
CMS Out of Service Sign |
August 2016 |
|
|
|
Clearview Font Lettering for Guide Signs |
March 2019 |
|
|
|
Work Zone Traffic Control Training Procedures |
January 2017 |
|
|
|
Traffic Signal Controller Actuated Warning Beacons (under revision, reference: TE-348 email) |
June 2023/May 2007 |
|
|
|
Work Zone Speed Analysis |
November 2009 |
|
|
|
Transportation Management Plan Requirements |
January 2017 |
IIM-LD-241.7 |
|
|
Establishing Procedures for Shop Plans, Modifications, Maintenance, and Inspection of Traffic Structures |
July 2008 |
IIM-SB-82 |
|
|
NCHRP 350 Test Requirements |
September 2016 |
IIM-LD-222.13 |
|
|
Signing and Sealing of Traffic Engineering Plans and Documents by Licensed PE’s |
July 2017 |
|
|
|
No Loitering Signs |
August 2009 (Reissued August 2016) |
|
|
|
Speed Limit Change Process |
October 2014 |
|
|
|
Guardrail System Upgrade |
April 2019 |
|
|
|
Guardrail System Spot Repair |
April 2019 |
|
|
|
Rumble Strips and Rumble Stripes |
September 2022 |
IIM-LD-212.7 |
|
|
Warning Signs – Deer and Other Large Animal Crossing |
December 2011 (Reissued August 2016) |
|
|
|
Variable Speed Limit Implementation Requirements and Guidance |
October 2014 |
|
|
|
Pole-Mounted Speed Display Sign |
April 2013 |
|
|
|
Maximum Span Length Limits for Ancillary Structures, and Bridge Parapet Mounts |
May 2021 |
IIM-SB-89.1 |
|
|
Roles and Responsibilities for Compliance with the Americans with Disabilities Act, Curb Ramp Assessment, Curb Ramp Improvement |
October 2017 |
|
|
|
Program for Americans with Disabilities Act Compliance of Department Right-of-Way Assets |
August 2014 |
CR-5 |
|
|
High Visibility Signal Backplates (HVSBs) |
April 2016 |
|
|
|
Overhead Street Name Signs (OSNS) |
June 2016 |
|
|
|
Overhead Sign Lighting |
May 2019 |
|
|
|
Flashing Yellow Arrow Signal Indication for Permissive Left-Turn Movements |
January 2016 |
|
|
|
Request for Marking VDOT Utility Location |
March 2016 |
IIM-TMPD-541 |
|
|
Pedestrian Crossing Accommodations at Unsignalized Locations |
August 2022 |
|
|
|
Roles and Responsibilities of District Traffic Engineers (DTEs) |
January 2017 |
|
|
|
Guidelines for the use of Portable Temporary Rumble Strips (PTRS) |
May 2021 |
||
|
Requirements for Signal Justification Reports (SJRs) for New and Reconstructed Signals |
November 2019 |
|
|
|
Accessible Pedestrian Signals and Accessible Pedestrian Signal Detectors |
December 2017 |
||
|
Innovative Intersections Committee |
May 2018 |
IIM-LD-257 |
|
|
Roadway Lighting |
May 2019 |
||
|
Pavement Shoulder Wedge |
February 2020 |
IIM-MD-002.1 |
|
|
Pavement Marker Usage in VDOT Projects, Permit, and Maintenance Activities |
November 2020 |
||
|
Flashing Beacons |
September 2020 |
||
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Temporary Pavement Marking Width and Materials |
February 2021 |
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Virginia Intersection and Interchange Control Assessment Program (iCAP) Policy and Guidance |
|||
|
Stop for Pedestrians Signs |
July 2023 |
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Design, Location and Installation Criteria of Stop for Pedestrians and Yield to Pedestrians fine signs for use in certain localities |
July 2023 |
Table 2 – IIMs issued under former Operations Division; Incident Management and Highway Operations IIMs
|
Subject |
Last Revised |
Cross-Reference |
|
|
IMC & SSP Vehicle Schematic |
November 2023 |
|
|
|
Vehicle Operations and Traffic Incident Response |
August 2023 |
||
|
Two-Way Radio Communications |
June 2023 |
IIM-OD-20-02 |
|
|
Changeable Message Signs (CMS) Usage |
June 2023 |
IIM-OD-13.03 |
|
|
VDOT Incident Photograph Policy |
May 2022 |
|
|
|
After Action Reviews and Reports |
April 2021 |
|
|
|
ITS (Roadway Operations Technology) Architecture Requirements |
March 2021 |
IIM-LD-261 |
|
|
Traffic Incident Process |
August 2020 |
|
|
|
Incident Detour Plan |
May 2020 |
|
|
|
Push, Pull, Tug |
May 2020 |
|
|
|
Superload Move Procedures |
January 2020 |
|
|
|
Changeable Message Signs (CMS) Usage |
August 2019 |
|
|
|
VDOT Fiber Optics Infrastructure |
May 2017 |
IIM-LD-230.2 |
|
|
Communication regarding VDOT Lane Closure Coordination and Implementation |
January 2017 |
|
|
|
Requests for Marking VDOT Utility Location |
March 2016 |
IIM-TMPD-541 |
|
|
Processing Calls to Residencies |
March 2016 |
IIM-MD-2016.3.0 |
|
|
Communication Regarding Maintenance and Operations Requests |
May 2015 |
|
|
|
VDOT’s Authority Having Jurisdiction (AHJ) Process |
December 2011 |
IIM-SB-88 |
Memoranda issued by other VDOT Divisions
- Alternative Project Delivery Division
- Construction Division
- Cost Estimation Office
- Environmental Division
- Location & Design Division
- Maintenance Division
- Materials Division
- Office of Land Use
- Structures and Bridge Division
- Transportation and Mobility Planning Division
Disclaimer: The information provided in this electronic version of the Instructional and Informational Memoranda is a product of, and copyrighted by, the Virginia Department of Transportation (VDOT) and is intended to be used for informational purposes only and is not to be sold or otherwise distributed for profit. Although this data has been tested by the Virginia Department of Transportation, no expressed or implied warranties are made by VDOT concerning, the accuracy, completeness, reliability and usability of this information. The Virginia Department of Transportation assumes no responsibility for any incorrect outcomes or damage resulting from the use of this information. All users shall expressly hold the Virginia Department of Transportation harmless from any liability or loss due to a virus or any other computer or software generated problem associated with these files.