(IMUTCD) Maryland State Highway Administration: Maryland Manual on Uniform Traffic Control Devices (MdMUTCD) Michigan Department of Transportation: Michigan Manual on Uniform Traffic Control Devices (MMUTCD) Minnesota Department of Transportation: Minnesota Manual on Uniform Traffic Control Devices (MN MUTCD) Missouri Department of Transportation: Engineering Policy Guide (EPG), section 900 Ohio Department of Transportation: Ohio Manual of Uniform Traffic Control Devices (OMUTCD) Texas Department of Transportation: Texas Manual on Uniform Traffic Control Devices (TMUTCD) Utah Department of Transportation: Utah Manual on Uniform Traffic Control Devices (Utah MUTCD) Other jurisdictions The United States is among the majority of countries around the world that have not ratified the Vienna Convention on Road Signs and Signals (based primarily on European signage traditions), and the FHWA MUTCD differs significantly from the Vienna Convention. Apart from the 1971 effort to adopt several Vienna Convention-inspired symbol signs (as explained above), achieving worldwide uniformity in traffic control devices was never a priority for AASHTO because the number of motorists driving regularly on multiple continents was relatively small during the 20th century. Warning signs (alerting drivers of unexpected or hazardous conditions) tend to be more verbose than their Vienna Convention counterparts. On the other hand, MUTCD guide signs (directing or informing road users of their location or of destinations) tend to be less verbose, since they are optimized for reading at high speeds on freeways and expressways. The MUTCD lacks a mandatory sign group like the Vienna Convention does, a separate category for those signs like "Right Turn Only" and "Keep Right" that tell traffic what it must do instead of what it must not do. Instead, the MUTCD primarily classifies them with the other regulatory signs that inform drivers of traffic regulations. The MUTCD has become widely influential outside the United States; for example, the use of yellow stripes to divide opposing traffic has been widely adopted throughout the Western Hemisphere. Australia, New Zealand, Ireland and some Asian countries use many road signs influenced by the MUTCD. Canada For road signs in Canada, the Transportation Association of Canada (TAC) publishes its own Manual of Uniform Traffic Control Devices for Canada for use by Canadian jurisdictions. Although it serves a similar role to the FHWA MUTCD, it has been independently developed and has a number of key differences with its US counterpart, most notably the inclusion of bilingual (English/French) signage for jurisdictions such as New Brunswick and Ontario with significant