MUTCD FAQ

Where can I get a copy of the IMUTCD?

Since the IMUTCD is over 900 pages, agencies typically access it online on the INDOT website, or only print out certain chapters. If you want a printed copy, contact your local print shop to make arrangements. You should wait until the new version is available though, since that’s coming soon.

Do I have to follow the MUTCD?

Yes, Indiana Code (IC) 9-21-4-1 dictates all agencies follow the Indiana Manual on Uniform Traffic Control Devices (IMUTCD).

Which version do I use - State or Federal?

Indiana adopts its own MUTCD that is in substantial conformance with the federal version. Agencies within Indiana should follow the Indiana MUTCD.

When is the new Indiana MUTCD expected?

January 2026

What happens if I don’t follow the MUTCD?

If any incident like a traffic crash occurs in the vicinity of or because of a non-standard traffic control device, the agency is opening themselves up to potential tort liability lawsuit, where the judge may assign partial liability for not following Indiana Code.

What type of roads are exempt from IMUTCD requirements?

All roads open to public travel must comply with the IMUTCD. Private gated roads are not included.

I saw the next town/state over do something, but I’m told I can’t because it’s not in the MUTCD – what gives?

Not every agency is aware of the IMUTCD requirements, or that device may be an older one that hasn’t been replaced yet. It’s best to follow what’s required, not necessarily what you see others doing.

Why did my sign vendor sell me non-compliant signs?

These vendors may make signs for uses other than roads and will usually give you exactly what you order without question. If you order signs from a manufacturer, it’s up to you know what the IMUTCD requires for your roads and order accordingly.

How many signs can I put on one post?

Typically, it’s one sign per post since drivers can only process so much information at once; however, there are exceptions that allow specific combinations of signs to be installed on the same post. For example, “Cross Traffic Does Not Stop” plaques can be installed under stop signs. The IMUTCD will note what combination of signs is allowed; see section 2A.16, paragraph 5.

Can I put street name signs on top of stop signs?

Yes, IMUTCD Section 2A.16, paragraph 5 explicitly defines this particular use. However, if the stop sign is owned and maintained by another agency, get their permission first.

Who’s responsible for signs at state/county or state/city roads?

Typically, any intersection with a state road is the jurisdiction of INDOT since they own the right-of-way (ROW), so they are responsible for any stop signs or signals at an intersection. If any advance warning signs are required (e.g., Stop Ahead where warranted by limited sight distance), INDOT will take care of those as well. INDOT may also allow street name signs in their ROW with permission. If unsure, contact your local INDOT District.

Can I use Children at Play signs?

These signs are not in the IMUTCD and are also not effective. Unless under the advice of an engineer, an agency should only use standard signs found in the IMUTCD.

Where can I find speed bump designs in the IMUTCD?

Speed-control traffic calming devices, like speed humps, are roadway design elements so are not in the IMUTCD. The traffic control devices for those design elements are in the IMUTCD, such as the warning signs and pavement markings.

Do I need a study to put in an all-way stop?

The decision to put in an all-way stop should be based on an engineering study. To deviate from this requires engineering judgement. Completing a study ensures this level of traffic control is warranted, as unwarranted traffic control devices lead to poor driver behavior.

What are statutory speed limits?

The state sets default speed limits for different types of roads: 55mph for rural roads and 30mph for roads within an urban district. See IC 9-21-5 for more detailed information about the minimum and maximum speed limits for your roads and also what’s required to change them. See IC 9-13-2-193 for the definition on an urban district.

How do I change a speed limit?

IC 9-21-5-6 requires an engineering study to alter a speed limit in all rural areas and some urban areas. Some streets in urban districts can be set to 20mph or 25mph without a study. The study should take into account the context and users of the road, especially pedestrians and cyclists. The study can also determine if traffic calming or design changes are needed for the road to actually affect traffic speeds; it’s rare that just changing the speed limit sign has a significant effect on overall speeds.

Where are the Hidden Drive signs hiding in the MUTCD?

This sign is no longer in the IMUTCD. Instead, agencies should use the Hill Blocks View sign (W7-6) when a hill presents a sight distance issue.

Is artwork allowed in crosswalks?

The IMUTCD allows for aesthetic surface treatments within crosswalks, including artwork, as long as they don't interfere with traffic control devices or cause confusion for pedestrians. These treatments should use colors outside the standard range for traffic markings and avoid designs that encourage loitering or inhibit pedestrian movements.

We make our own signs - Where can I find sign design specs?

FHWA publishes a supplement called the Standard Highway Signs that contains detailed specifications on sign layout and dimensions.

Who has jurisdiction over railroad signs and markings?

Signs within the railroad’s right-of-way are the responsibility of the railroad. Signs and markings on the approaches to the crossing are the responsibility of the local agency who owns that road.

The IMUTCD is so long – how do I find information easily?

We suggest using the PDF version, which you can also download to a computer for employees. Use Control-F to open a search box in the PDF version and enter your search term.

Where can I find more information?

INLTAP offers free online training on the IMUTCD in our Learning Management System. Access this through our website. You can also contact Laura Slusher, PE for any MUTCD-related questions at lslusher@purdue.edu or 765-494-7038.