A stop sign is a traffic sign designed to notify drivers that they must come to a complete stop and make sure the intersection is safely clear of vehicles and pedestrians before continuing past the sign. In many countries, the sign is a red octagon with the word STOP, in either English, the national language of that particular country, or both, displayed in white or yellow. The Vienna Convention on Road Signs and Signals also allows an alternative version: a red circle with a red inverted triangle with either a white or yellow background, and a black or dark blue STOP. Some countries may also use other types, such as Japan's inverted red triangle stop sign. Particular regulations regarding appearance, installation, and compliance with the signs vary by some jurisdictions.
The Manual on Uniform Traffic Control Devices for Streets and Highways is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed, and used. In the United States, all traffic control devices must legally conform to these standards. The manual is used by state and local agencies as well as private construction firms to ensure that the traffic control devices they use conform to the national standard. While some state agencies have developed their own sets of standards, including their own MUTCDs, these must substantially conform to the federal MUTCD.
In road transport, a give way or yield sign indicates that merging drivers must prepare to stop if necessary to let a driver on another approach proceed. A driver who stops or slows down to let another vehicle through has yielded the right of way to that vehicle. In contrast, a stop sign requires each driver to stop completely before proceeding, whether or not other traffic is present. Under the Vienna Convention on Road Signs and Signals, the international standard for the modern sign is an inverted equilateral triangle with a red border and either a white or yellow background. Particular regulations regarding appearance, installation, and compliance with the signs vary by some jurisdiction.
A reassurance marker or confirming marker is a type of traffic sign that confirms the identity of the route being traveled on. It does not provide information found on other types of road signs, such as distances traveled, distances to other locations or upcoming intersections, as is done by highway location markers.
A regulatory sign is used to indicate or reinforce traffic laws, regulations or requirements which apply either at all times or at specified times or places upon a street or highway, the disregard of which may constitute a violation, or a sign in general that regulates public behavior in places open to the public. The FHWA defines regulatory sign as "a sign that gives notice to road users of traffic laws or regulations".
The Standard Alphabets For Traffic Control Devices,, is a sans-serif typeface developed by the United States Federal Highway Administration (FHWA). The font is used for road signage in the United States and many other countries around the world. The typefaces were developed to maximize legibility at a distance and at high speed. The typeface has 6 fonts, from narrow to wider strokes:
The Convention on Road Signs and Signals, commonly known as the Vienna Convention on Road Signs and Signals, is a multilateral treaty to standardize the signing system for road traffic in use internationally.
Mandatory signs are road signs that are used to set the obligations of all traffic that uses a specific area of road. Most mandatory road signs are circular in shape and may use white symbols on a blue background with a white border, or black symbols on a white background with a red border, although the latter is also associated with prohibitory signs.
Like many South American countries, the road signs in Brazil are strongly based on the US MUTCD standard, but with text in Portuguese. The regulatory, prohibitory and mandatory signs are all of them white circular with red borders, with the exception of the stop and the yield sign. The warning signs are yellow diamonds. Units are expressed in compliance with the International System of Units.
The road signs used in Mexico are regulated by Secretaría de Infraestructura, Comunicaciones y Transportes's Directorate-General for Roads, and uniformized under a NOM standard and the Manual de Señalización y Dispositivos para el Control del Tránsito en Calles y Carreteras, which serves as a similar role to the MUTCD developed by the Federal Highway Administration in the United States. The signs share many similarities with those used in the United States and Canada. Like Canada but unlike the United States, Mexico has a heavier reliance on symbols than text legends.
Road signs in Colombia are regulated in the Manual de Señalización Vial standard, which is developed by the Ministry of Transport and based on the United States' MUTCD. Many regulatory signs are based on European signs, i.e. the Vienna Convention on Road Signs and Signals, while many warning signs are based on U.S. and Canadian signs, i.e. on MUTCD.
In Argentina, road signs are similar to those of other South American countries. They are something of a compromise between the Vienna Convention signs used in Europe and the U.S. system. Argentina is right-hand traffic.
Road signs in Chile are regulated in the Manual de Señalización de Tránsito, which is based on both the United States' MUTCD and the Vienna Convention on Road Signs and Signals, to which Chile is a signatory. Therefore, road signs are compliant with international standards. Chile uses yellow diamonds for warning signs in common with most of the rest of the Americas. Speed limit signs are a red circle with a white background and the limitation in black, and are in kilometres per hour. There are also some signs unique to Chile. Chile also currently uses a mixture of both types of mandatory signs: European-style signs with white symbols on a blue background and a white border, and signs with black symbols on a white background and a red border.
Road signs used by countries in the Americas are significantly influenced by the Manual on Uniform Traffic Control Devices (MUTCD), first released in 1935, reflecting the influence of the United States throughout the region. Other non-American countries using road signs similar to the MUTCD include Australia, Indonesia, Ireland, Japan, Malaysia, New Zealand, and Thailand. They, along with the US Virgin Islands, are also the only countries listed here which drive on the left—with the exception of Liberia and the Philippines, both of which drive on the right.
This article is a summary of traffic signs used in each country.
Road signs in Cuba are regulated in Ley No. 109 Código de Seguridad Vial and generally conform to the 1968 Vienna Convention on Road Signs and Signals.
Road signs in Ecuador are regulated in Manual Básico de Señalización Vial and Reglamento Técnico Ecuatoriano. RTE INEN 004-1:2011. Señalización vial, which is based on the United States' Manual on Uniform Traffic Control Devices (MUTCD) originally developed by the Federal Highway Administration (FHWA). Thus, road signs in Ecuador are similar in design to road signs used in the United States. One of the differences is that Ecuador uses the metric system, for example, vehicle speed is measured in km/h.
Road signs in Puerto Rico are regulated in the Manual de Rotulación para las Vías Públicas de Puerto Rico, Puerto Rico’s supplement to the Manual on Uniform Traffic Control Devices (MUTCD), the standard for road signs, signals, and markings in the United States. It is developed by the Puerto Rico Highways and Transportation Authority (PRHTA) "in substantial conformance to" the national MUTCD developed by the Federal Highway Administration.
