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Traffic & Safety

Traffic and Safety Manual

The Iowa DOT currently uses the 2009 Manual on Uniform Traffic Control Devices (MUTCD) except for exceptions noted in 761 IAC 130.1.

Call 515-239-1557 for questions related to the content of this manual.

Chapter 1 - Introduction

Title Description Last updated
1A General 1/27/04

Chapter 2 - Signing

Title Description Last updated
2A General 11/05/15
11/05/15
11/05/15

11/05/15
11/05/15
12/17/01
5/08/13
10/02/06
11/05/15
2B Regulatory Signs 12/12/05
10/02/06
6/26/20
12/12/05
12/12/05
7/18/18
4/23/07
2C Warning Signs 7/18/18   
10/13/06
12/16/05
2D Guide Signs 6/10/20
3/18/19
6/10/20
2E Portable Changeable Message Signs 12/16/05
2F Permanent Changeable Message Signs 12/16/05
12/16/05
12/16/05
12/16/05
2G Scenic Byways Signs 5/17/11

 

Chapter 3 - Pavement Markings

Title Description Last updated
3A General 1/27/04
1/27/04
3B Pavement Markings Standards 01/04/21
4/26/13
3C Manual on Pavement Marking Programs 1/27/04
1/27/04
3D Pavement Markings Management Program    

Chapter 4 - Signals

Title Description Last updated
4A General 12/17/01
4B Installation Justification 12/17/01
4C Design
4C-2 Standards and Guidelines
4C-3 Plan Requirements
4C-4 Specifications and Special Provisions 		12/17/01
4D Construction 4D-1 Shop Drawings and Catalog Cuts
4D-2 Daily Inspections
4D-3 Final Inspection
6/06/06
4E Operations
4E-2 Timings
4E-3 Phasing
4E-4 Coordination
4E-5 Flashing Operation
4E-6 Pre-emption 		12/17/01
4G Removal 4G-1 Justification
4G-2 Procedure 		 

Chapter 5 - Speed Limits

Title Description Last updated
5A Process for Establishing Speed Limits 04/04/06

Chapter 6 - Lighting

Title Description Last updated
6A General
12/17/01
6B Rural Intersections 12/17/01
6C Interchanges 12/17/01
6D Freeways 12/17/01
6E Freeways 12/01/11

Chapter 7 - Traffic Engineering Studies

Title Description Last updated
7A No Passing Zones 05/07/13
02/07/06
2/07/06
2/07/06
7B Curve Speed 10/02/06
7C Curve Speed Study 7C-1 County Road
7C-2 Rural Primary
7C-3 Primary Highway Extension 		 
7E Traffic Control Warrant Studies 7E-1 Traffic Signal Warrants
7E-2 Multiway Stop Warrants 		 
7F-1 School Crossing Study 10/02/06
7G Sight Distance Studies 2/07/06
7/18/18 
10/02/06
7H Delay Studies 2/19/07
7I Traffic Volume 2/19/07
7J Signing and Pavement Marking Audits 7J-2 Pavement Marking Audits 2/07/06

Chapter 8 - Automated Traffic Enforcement

Title Description Last updated
8A Automated Traffic Enforcement 8A-1 Automated Traffic Enforcement
 01/04/2021

Chapter 9 - Temporary Traffic Control

Title Description Last updated
9A General
 
9B Traffic Control Standards Chapter not available
Standard Road Plans TC 		 
9C Offsite Detours    

Chapter 10 - Access

Title Description Last updated
10A Access - General
 
10B Access - Frequently Asked Questions Chapter not available
 
 

Chapter 11 - Advertising Management

Title Description Last updated
11 sign program 08/22/22

Chapter 15 - Sign Shop

Title Description Last updated
15A General 10/11/2021
15C How to Order Signs    

Chapter 16 - Sample Plans

Title Description Last updated

16A General
16B Signals
16C Signing
16D Lighting Plans

  4/04/06

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