Memos & Updates
- NEW – Approved State Highway System (SHS) Intersection and Interchange Types for Designers – Oct. 31, 2025
- Flagger & Traffic Control Supervisor Certifications & Recertifications – Jan. 31, 2024
- Setting Work Zone Speed Limits – March 28, 2023
- Liquidated Damages Schedule – March 15, 2021
- Proprietary Products Approval – June 16, 2020
- Lump Sum Temporary Traffic Control – Jan. 21, 2020
- Left-Turn Signal Phasing Guidance – Jan. 15, 2020
- Interchange Modification & Justification Reports – Jan. 10, 2020
- Median Crossovers on Divided Highway Construction Projects – Jan. 9, 2020
- Changing Speed Zones – November 25, 2019
- AASHTO Green Book 7th Edition: Summary of Changes – Oct. 22, 2018
- Implementation: Manual for Assessing Safety Hardware Transition – Aug. 24, 2017
- DESA Hydraulics Report Preparation & Acceptance – Aug. 9, 2016
Idaho Manual on Uniform Traffic Control Devices
Idaho adoption of Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD) with State exceptions.
Design Manual
Guidance for the development of projects through the ITD and FHWA approved development process.
Traffic Manual
Idaho’s Supplementary Guide to the Idaho MUTCD.
CADD Standards Guide
Computer Aided Drafting and Design (CADD) Standards Guide outlines ITD’s corporate workspace using Bentley System’s OpenRoads Designer software.
Standard Drawings
Standard drawings for use on ITD and federal-aid projects.
Standard Details
Standard details are tools used to quickly add details to a specific project.
ITD Sign Chart
Idaho supplement to the Standard Highway Signs and Markings Book.
Work Zone Resources
- ITD Flagger and TC Supervisor Certification & Reciprocity information.
- ITD Work Zone Safety and Mobility Program – Idaho’s program for safety and mobility through work zones.
Design & Traffic Guidance
| Title and Web Link | Description and Details | Type | Contact | Law, Rule or Other |
|---|---|---|---|---|
| AASHTO Greenbook 7 | Memo on the use of the updated AASHTO Greenbook 7 | Memo | monica.crider@itd.idaho.gov | Other |
| Contract Time Determination Manual | Procedures for the determination of contract time | Manual | marc.danley@itd.idaho.gov | Other |
| Constructability Review Guidelines | Guidelines for reviews during project development to ensure that projects are biddable, buildable, cost-effective and maintainable. | Manual | marc.danley@itd.idaho.gov | Other |
| Flagger & TCS Cert. & Recertification | Memo on Flagger & Traffic Control Supervisor Certifications & Recertifications | Memo | kevin.sablan@itd.idaho.gov | Other |
| Guardrail Terminal Charts | Catalog of guardrail terminals and guidelines for terminal selection | Other | marc.danley@itd.idaho.gov | Other |
| Hydraulics Report Memo | Memo outlining preparation and acceptance of hydraulic reports. | Memo | monica.crider@itd.idaho.gov | Other |
| Interchange Modification & Justification Reports | Guidance on preparing interchange modification and justification reports | Memo | monica.crider@itd.idaho.gov | Other |
| Left-Turn Signal Memo | Guidance on left-turn signal phasing | Memo | kevin.sablan@itd.idaho.gov | Other |
| Liquidated Damages | Memo updating ITD's liquidated damages schedule. | Memo | monica.crider@itd.idaho.gov | Other |
| Lump Sum Temporary Traffic Control | Memo on the use of temporary traffic control by lump sum on projects | Memo | monica.crider@itd.idaho.gov | Other |
| Manual for Assessing Safety Hardware (MASH) Implementation | ITD adoption of procedures for testing roadside safety hardware (e.g., metal guardrail, concrete barriers, sign supports) to be installed on the State highway system. | Memo | monica.crider@itd.idaho.gov | Other |
| Median Crossovers | Guidance on the use of median crossovers on divided highway construction projects | Memo | kevin.sablan@itd.idaho.gov | Other |
| Pipe Materials Selection & Specification Procedures | Guide on drainage pipe selection | Other | marc.danley@itd.idaho.gov | Other |
| Practical Design Guide | ITD guide for building cost-effective projects that achieve good, safe, and efficient transportation system. | Other | marc.danley@itd.idaho.gov | Other |
| Proprietary Products | Memo on ITD use of proprietary products and patented materials | Memo | monica.crider@itd.idaho.gov | Other |
| Road Inventory Determination of an Improved Road | This document sets forth the standard for an improved road if it is to be eligible for funding through the Local Road Inventory Program. | Other | monica.crider@itd.idaho.gov | IDAPA Rule 39.03.47 |
| Setting Speed Limits | Procedures for changing speed limits on the state highway system | Memo | kevin.sablan@itd.idaho.gov | Other |
| Traffic Manual | Idaho's Supplementary Guide to the MUTCD on traffic control devices. | Manual | ryan.lancaster@itd.idaho.gov | Other |
| Traffic Signal & ITS Equipment Specifications | Equipment specifications | Other | mona.hunt@itd.idaho.gov | Other |
| Value Engineering Guide | Guidelines for providing a consistent and uniform process for value engineering studies during the development of a transportation project. | Other | marc.danley@itd.idaho.gov | Other |