Treaty

European Agreement supplementing the Convention on Road Signs and Signals opened for signature at Vienna on 8 November 1968

Date modified Regarding
16-04-2026 Party

Party

Netherlands, the Kingdom of the modified

  • added reservation
    26-11-2025
    … The Permanent Representation wishes to inform the Secretary-General that in the Kingdom of the Netherlands, the constitutional requirements for the acceptance of the above-mentioned amendments will take longer than twelve months. Therefore, in accordance with Article 6, paragraph 2, under a, of the above-mentioned Agreement, the Kingdom of the Netherlands hereby notifies the Secretary-General of its rejection of the above-mentioned amendments. Once the constitutional requirements for the acceptance of the above-mentioned amendments have been met, the Kingdom of the Netherlands will notify the Secretary-General that it accepts the amendments in accordance with Article 6, paragraph 5, under b, of the above-mentioned Agreement…


13-06-2024 Party

Party

Türkiye modified

  • added reservation
    17-05-2023
    Reservations 1. In relation to paragraph 1 of Article 11 of the European Agreement, the Republic of Türkiye declares that it does not consider itself bound by Article 9 of the Agreement. 2. With respect to point 22 of the Annex of the European Agreement (amendment to Annex 1, section E, subsection II, paragraph 7, subparagraphs (a) and (b) of the Convention), the Republic of Türkiye reserves the right to use signs E, 7d and E, 8d . 3. With respect to point 23 of the Annex of the European Agreement (amendment to Annex 1, section F, subsection II, paragraph 1 of the Convention), the Republic of Türkiye reserves the right to use symbol F, 1b . 4. With respect to point 25 of the Annex of the European Agreement (amendment to Annex 1, section G, subsection III, paragraphs 1 and 2 of the Convention), the Republic of Türkiye reserves the right to use signs G, 4 c and G, 6c. Declaration Türkiye’s decision to become a party to the Convention on Road Signs and Signals, and its supplements, should in no way be construed as implying any form of recognition of the Greek Cypriot Administration’s pretention to represent the “Republic of Cyprus”, nor as implying any obligation on the part of Türkiye to enter into any dealing with authorities or institutions of the so-called “Republic of Cyprus” within the framework of the activities specified in the said Convention and its supplements.

    added objection to reservation

    Objection Greece, 22-05-2024

    The Hellenic Republic has examined the declaration made by the Republic of Türkiye upon accession, on 17 May 2023, to the European Agreement supplementing the Convention on Road Signs and Signals (1971) (“the Agreement”). The Republic of Türkiye inter alia declares that its accession to the Agreement does not imply any obligation on the part of Türkiye to enter into any dealing with authorities or institutions of the Republic of Cyprus within the framework of the activities specified in the said Agreement. The Government of the Hellenic Republic reiterates its view that the above declaration amounts to a reservation, as it purports to exclude the application of the Agreement in its entirety between Türkiye and another State Party, i.e. the Republic of Cyprus. In addition, the untenable position put forward by Türkiye concerning the non-recognition of the Republic of Cyprus, a member of, among others, the United Nations and the European Union, is neither relevant to nor compatible with the content of the Agreement, its object and purpose. Therefore, the Hellenic Republic objects to the declaration in question. This objection does not preclude the entry into force of the Agreement between the Hellenic Republic and the Republic of Türkiye.


08-05-2024 Party

Party

Türkiye modified

  • Objections: Yes
  • added reservation
    17-05-2023
    Reservations 1. In relation to paragraph 1 of Article 11 of the European Agreement, the Republic of Türkiye declares that it does not consider itself bound by Article 9 of the Agreement. 2. With respect to point 22 of the Annex of the European Agreement (amendment to Annex 1, section E, subsection II, paragraph 7, subparagraphs (a) and (b) of the Convention), the Republic of Türkiye reserves the right to use signs E, 7d and E, 8d . 3. With respect to point 23 of the Annex of the European Agreement (amendment to Annex 1, section F, subsection II, paragraph 1 of the Convention), the Republic of Türkiye reserves the right to use symbol F, 1b . 4. With respect to point 25 of the Annex of the European Agreement (amendment to Annex 1, section G, subsection III, paragraphs 1 and 2 of the Convention), the Republic of Türkiye reserves the right to use signs G, 4 c and G, 6c. Declaration Türkiye’s decision to become a party to the Convention on Road Signs and Signals, and its supplements, should in no way be construed as implying any form of recognition of the Greek Cypriot Administration’s pretention to represent the “Republic of Cyprus”, nor as implying any obligation on the part of Türkiye to enter into any dealing with authorities or institutions of the so-called “Republic of Cyprus” within the framework of the activities specified in the said Convention and its supplements.

    added objection to reservation

    Objection Cyprus, 26-04-2024

    The Republic of Cyprus has examined the Declaration deposited by the Republic of Türkiye on 17 May 2023, upon accession to the European Agreement supplementing the Convention on Road Signs and Signals (1971), and notes that such a declaration is not in conformity with the Agreement. By means of the submitted Declaration, Türkiye purports to release itself of the obligation to cooperate with other States Parties within the framework of the European Agreement supplementing the Convention on Road Signs and Signals. Moreover, in its Declaration Türkiye puts forward, once again, the untenable position concerning the non-recognition of the Republic of Cyprus, a member of, among others, the United Nations and the European Union. In the view of the Republic of Cyprus, the Declaration of Türkiye is compatible neither with Article 11 of the European Agreement supplementing the Convention on Road Signs and Signals nor the object and purpose thereof given that the allegations contained therein are irrelevant to the content of the Agreement. In light of the above, it is the position of the Republic of Cyprus that the content and purported effect of this Declaration submitted by the Republic of Türkiye is in contravention of the European Agreement supplementing the Convention on Road Signs and Signals. The Republic of Cyprus, therefore, rejects the aforementioned Declaration made by the Republic of Türkiye, which cannot in any way affect the obligations of the Republic of Türkiye towards the Republic of Cyprus both under general international law and the said Agreement and considers it null and void. The objection of the Republic of Cyprus shall not preclude the entry into force of the European Agreement supplementing the Convention on Road Signs and Signals, in its entirety, between the Republic of Cyprus and the Republic of Türkiye.


05-06-2023 Party

Party

Türkiye modified

  • Ratification: 17-05-2023 (A)
  • Entry into force: 17-05-2024
  • Reservations / Declarations: Yes
  • Objections: No
  • added reservation
    17-05-2023
    Reservations 1. In relation to paragraph 1 of Article 11 of the European Agreement, the Republic of Türkiye declares that it does not consider itself bound by Article 9 of the Agreement. 2. With respect to point 22 of the Annex of the European Agreement (amendment to Annex 1, section E, subsection II, paragraph 7, subparagraphs (a) and (b) of the Convention), the Republic of Türkiye reserves the right to use signs E, 7d and E, 8d . 3. With respect to point 23 of the Annex of the European Agreement (amendment to Annex 1, section F, subsection II, paragraph 1 of the Convention), the Republic of Türkiye reserves the right to use symbol F, 1b . 4. With respect to point 25 of the Annex of the European Agreement (amendment to Annex 1, section G, subsection III, paragraphs 1 and 2 of the Convention), the Republic of Türkiye reserves the right to use signs G, 4 c and G, 6c. Declaration Türkiye’s decision to become a party to the Convention on Road Signs and Signals, and its supplements, should in no way be construed as implying any form of recognition of the Greek Cypriot Administration’s pretention to represent the “Republic of Cyprus”, nor as implying any obligation on the part of Türkiye to enter into any dealing with authorities or institutions of the so-called “Republic of Cyprus” within the framework of the activities specified in the said Convention and its supplements.


17-05-2023 General information, Kingdom part, Party

General information

  • Entry into force: 03-08-1979

Kingdom part

Netherlands (in Europe)

  • Entry into force: 08-11-2008

Party

Albania

  • Ratification: 06-06-2005 (A)
  • Entry into force: 06-06-2006

Austria

  • Signature: 15-12-1972
  • Ratification: 11-08-1981 (R)
  • Entry into force: 11-08-1982

Belgium

  • Signature: 28-10-1971
  • Ratification: 16-11-1988 (R)
  • Entry into force: 16-11-1989

Bosnia and Herzegovina

  • Ratification: 12-01-1994 (Su)
  • Entry into force: 06-03-1992

Bulgaria

  • Ratification: 28-12-1978 (A)
  • Entry into force: 28-12-1979

Czech Republic

  • Ratification: 02-06-1993 (Su)
  • Entry into force: 01-01-1993

Czechoslovakia (<01-01-1993)

  • Ratification: 07-06-1978 (A)
  • Entry into force: 03-08-1979

Georgia

  • Ratification: 15-05-2001 (A)
  • Entry into force: 15-05-2002

Greece

  • Ratification: 18-12-1986 (A)
  • Entry into force: 18-12-1987

Italy

  • Ratification: 07-02-1997 (A)
  • Entry into force: 07-02-1998

Kazakhstan

  • Ratification: 07-06-2011 (A)
  • Entry into force: 07-06-2012

Latvia

  • Ratification: 20-11-2001 (A)
  • Entry into force: 20-11-2002

Lithuania

  • Ratification: 31-01-1992 (A)
  • Entry into force: 31-01-1993

Luxembourg

  • Signature: 25-05-1971
  • Ratification: 25-11-1975 (R)
  • Entry into force: 03-08-1979

Moldova

  • Ratification: 27-10-2015 (A)
  • Entry into force: 27-10-2016

Montenegro

  • Ratification: 23-10-2006 (Su)
  • Entry into force: 03-06-2006

North Macedonia

  • Ratification: 20-12-1999 (Su)
  • Entry into force: 17-11-1991

Serbia

  • Ratification: 12-03-2001 (Su)
  • Entry into force: 27-04-1992

Slovakia

  • Ratification: 28-05-1993 (Su)
  • Entry into force: 01-01-1993

Turkmenistan

  • Ratification: 31-08-2020 (A)
  • Entry into force: 31-08-2021

United Kingdom

  • Signature: 27-10-1971

Yugoslavia (< 25-06-1991)

  • Ratification: 06-06-1977 (A)
  • Entry into force: 03-08-1979

Azerbaijan

  • Ratification: 11-07-2011 (A)
  • Entry into force: 11-07-2012
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    11-07-2011
    Reservation: In relation to Article 11, the Republic of Azerbaijan declares that it does not consider itself bound by Article 9 of this Agreement. Declaration: The Republic of Azerbaijan declares that it is unable to guarantee implementation of the provisions of the Agreement in its territories occupied by the Republic of Armenia, until the liberation of those territories from the occupation and complete elimination of consequences of that occupation (....). Notification: In accordance with Article 6 (8), the Ministry of Internal Affairs of the Republic of Azerbaijan (Address: AZ1005, Baku city, Azerbaijan avenue 7) is the administration competent in the matter of agreement as contemplated in Article 6 (7) of the above-mentioned Agreement.


Belarus

  • Ratification: 17-12-1974 (A)
  • Entry into force: 03-08-1979
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    17-12-1974
    The Byelorussian Soviet Socialist Republic considers it necessary to state that the provisions of article 3 of the European Agreement supplementing the Vienna Convention on Road Traffic of 1968 and of article 3 of the European Agreement supplementing the Vienna Convention on Road Signs and Signals of 1968, under which States may extend the applicability of the Agreements to territories for the international relations of which they are responsible, are anachronistic and contrary to the Declaration of the United Nations General Assembly on the Granting of Independence to Colonial Countries and Peoples (General Assembly resolution 1514 (XV) of 14 December 1960), which proclaims the necessity of bringing to a speedy and unconditional end colonialism in all its forms and manifestations. The Byelorussian Soviet Socialist Republic does not consider itself bound by article 9 of the European Agreement supplementing the Vienna Convention on Road Traffic of 1968 or by article 9 of the European Agreement supplementing the Vienna Convention on Road Signs and Signals of 1968, under which disputes relating to the interpretation or application of the Agreements shall be referred to arbitration if any of the Parties in dispute so requests.


Cyprus

  • Ratification: 16-08-2016 (A)
  • Entry into force: 16-08-2017
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    16-08-2016
    The Republic of Cyprus does not consider itself bound by the provisions of article 9 […].


Denmark

  • Signature: 02-05-1972
  • Ratification: 03-11-1986 (R)
  • Entry into force: 03-11-1987
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    03-11-1986
    Reservation to article 27, paragraph 3 "according to which 'give way' shall be indicated both by transverse marking and a plate. (chapter XI.B.20)


Estonia

  • Ratification: 30-11-1993 (A)
  • Entry into force: 30-11-1994
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    30-11-1993
    Estonia does not consider itself bound by article 9 of the Agreement.


Finland

  • Signature: 22-12-1972
  • Ratification: 01-04-1985 (R)
  • Entry into force: 01-04-1986
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    01-04-1985
    Declaration: 1. With respect to Annex, paragraph 17 (amendment to Section B of Annex I, paragraphs 2 and 3 of the Convention: "Signs indicating dangerous descent and steep ascent), Finland reserves the right to use sign A, 2c of the Convention to indicate a dangerous descent, instead of sign A, 2a. Similarly sign A, 3c of the Convention is used to indicate a steep ascent instead of sign A, 3a; 2. With respect to Article 11, paragraph 3, Finland notifies that the reservations Finland has made to Article 18, preamble and paragraphs 4 and 5 of Section F of Annex 5 and paragraph 6 of Section F of Annex 5 of the Convention on Road Signs and Signals shall also apply to the European Agreement Supplementing the Convention. Reservation: With respect to Annex, paragraph 22 (amendment to the Note and Section A of Annex 4 of the Convention): Prohibition signs, Finland reserves the right to use an oblique red bar in signs corresponding to signs C, 3a -C, 3k of the Convention.

    reservation
    05-09-1995
    Modification of the text of the reservation made by Finland, as adapted in view of the entry into force of the amendments proposed by Belgium on 31 May 1994 to the 1968 Convention on Road Signs and signals: The reservation made by Finland [made upon ratification] also applies to signs C, 3g to C, 3h and C, 3m to C, 3n to the Annex.


France

  • Signature: 29-12-1972
  • Ratification: 16-01-1974 (R)
  • Entry into force: 03-08-1979
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    16-01-1974
    With regard to article 23, paragraph 3bis (b), of the Agreement on Road Signs and Signals, France intends to retain the possibility of using lights placed on the side opposite to the direction of traffic, so as to be in a position to convey meanings different from those conveyed by the lights placed on the side appropriate to the direction of traffic.


Germany

  • Signature: 28-05-1971
  • Ratification: 03-08-1978 (R)
  • Entry into force: 03-08-1979
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    03-08-1978
    Ad paragraph 3 of the annex (Article 1, sub-paragraph (l) of the Convention): The Federal Republic of Germany does not consider itself bound by paragraph 3 of the annex (article 1, sub-paragraph (l) of the Convention). Ad paragraph 15 of the annex Article 33, paragraph 1, sub-paragraph (a), No. (i) of the Convention): The Federal Republic of Germany does not consider itself bound by paragraph 15 of the annex (article 33, paragraph 1, sub-paragraph (a) No. (i) of the Convention).


Hungary

  • Signature: 29-12-1972
  • Ratification: 16-03-1976 (R)
  • Entry into force: 03-08-1979
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    16-03-1976
    The Presidential Council of the Hungarian People's Republic does not consider itself bound by the provisions of article 9 of the Agreement, in pursuance of article 11, paragraph 1, thereof. The Presidential Council of the Hungarian People's Republic declares that the provisions of article 2 of the European Agreement supplementing the Convention on Road Traffic opened for signature at Vienna on 8 November 1968, opened for signature at Geneva on 1 May 1971, are at variance with the generally recognized principle of the sovereign equality of States and it considers that these international instruments should be open for participation by all interested States without any discrimination. The Presidential Council of the Hungarian People's Republic further declares that the provisions . . . of article 3 of the European Agreement, supplementing the Convention on Road Traffic opened for signature at Vienna on 8 November 1968 opened for signature at Geneva on 1 May 1971, are at variance with the Declaration of the United Nations General Assembly on the Granting of Independence to Colonial Countries and Peoples [resolution 1514 (XV) of 14 December 1960].


Liechtenstein

  • Ratification: 02-03-2020 (A)
  • Entry into force: 02-03-2021
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    02-03-2020
    Reservation with regard to the annex, item 9 ad Article 10 of the Convention, paragraph 6 The Principality of Liechtenstein reserves the right to provide in its national legislation, as an advance warning sign for sign B 2a, for an identical sign with an additional panel model H 1 as indicated in annex 1, section H. Reservation with regard to the annex, item 9 bis ad Article 13 bis of the Convention, and item 22 ad annex 1, section E, subsection II of the Convention The Principality of Liechtenstein does not consider itself bound by the provisions of items 9 bis and 22 of the annex. Reservation with regard to the annex, item 12 ad Article 24 of the Convention, paragraph 2 The Principality of Liechtenstein reserves the right to provide in its national legislation for the use of the three-colour system for light signals for pedestrians, in accordance with article 24, paragraph 2, of the Convention. Declaration with regard to the reservations made under the Convention on Road Signs and Signals The relevant reservations of the Principality of Liechtenstein on the [Convention of 1968 on Road Signs and Signals] also apply to this Agreement. Notification with regard to Art. 6, paragraph 8 The administration competent in the matter of agreement as contemplated in paragraph 7 of Article 6 shall be: National Road Office


Netherlands, the Kingdom of the

  • Ratification: 08-11-2007 (A)
  • Entry into force: 08-11-2008
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    08-11-2007
    With reference to part 22 of the Annex and the Appendix to this Annex to the European Agreement, a reservation is made with respect to the no entry sign for vehicles carrying more than a certain quantity of explosives or readily inflammable substances or of substances liable to cause water pollution. With reference to part 19 amending the Annex to the European Agreement, a reservation is made with respect to the no entry sign for vehicles carrying more than a certain quantity of explosives or readily inflammable substances and the no entry sign for vehicles carrying more than a certain quantity of substances liable to cause water pollution.


Poland

  • Ratification: 23-08-1984 (A)
  • Entry into force: 23-08-1985
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    23-08-1984
    The Polish People's Republic will use symbol A, 2c (dangerous descent) instead of symbol A, 2a, and symbol A, 3c (steep ascent) instead of symbol A,3a provided for in item 17 of the annex to the aforesaid Agreement in accordance with the provisions of Annex 1, Section B, paragraphs 2 and 3, of the Convention on Road Signs and Signals.


Romania

  • Signature: 06-10-1972
  • Ratification: 09-12-1980 (R)
  • Entry into force: 09-12-1981
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    09-12-1980
    Reservation made upon signature and confirmed upon ratification: a. The Socialist Republic of Romania declares that, in accordance with article 11, paragraph 1, of the European Agreement supplementing the Convention on Road Traffic opened for signature at Vienna on 8 November 1968, and with article 11, paragraph 1, of the European Agreement supplementing the Convention on Road Signs and Signals opened for signature at Vienna on 8 November 1968, it does not consider itself bound by article 9 of the two Agreements, under which any dispute between two or more Contracting Parties which relates to the interpretation or application of the Agreements and which is not settled by negotiation is to be referred to arbitration if any of the Parties so requests. It is the position of the Socialist Republic of Romania that such disputes may be referred to arbitration only with the consent of all the Parties in dispute in each individual case. Declaration made upon signature: b. The Council of State of the Socialist Republic of Romania considers that the provisions of article 2 of the European Agreement supplementing the Convention on Road Traffic opened for signature at Vienna on 8 November 1968, and article 2 of the European Agreement supplementing the Convention on Road Signs and Signals opened for signature at Vienna on 8 November 1968, are not in keeping with the principle that multilateral international treaties whose aim and purpose affect the international community as a whole should be opened to universal participation. Declaration made upon signature and confirmed upon ratification: c. The Council of State of the Socialist Republic of Romania feels that the maintenance of a dependent status for certain territories to which reference is made by the provisions of article 3 of the European Agreement supplementing the Convention on Road Traffic opened for signature at Vienna on 8 November 1968, is not in keeping with the Charter of the United Nations or with the documents adopted by the United Nations concerning the granting of independence to colonial countries and peoples, including the Declaration on Principles of International Law concerning Friendly Relations and Co-operation among States in accordance with the Charter of the United Nations, which was unanimously adopted in General Assembly resolution 2625 (XXV) of 24 October 1970 and which solemnly proclaims the duty of States to promote realization of the principle of equal rights and self-determination of peoples in order to bring a speedy end to colonialism.


Russian Federation

  • Ratification: 27-09-1974 (A)
  • Entry into force: 03-08-1979
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    27-09-1974
    The Union of Soviet Socialist Republics considers it necessary to state that the provisions of article 3 of the European Agreement supplementing the Vienna Convention on Road Traffic of 1968 and of article 3 of the European Agreement supplementing the Vienna Convention on Road Signs and Signals of 1968, under which States may extend the applicability of the Agreements to territories for the international relations of which they are responsible, are anachronistic and contrary to the Declaration of the United Nations General Assembly on the Granting of Independence to Colonial Countries and Peoples (General Assembly resolution 1514 (XV) of 14 December 1960), which solemnly proclaims the necessity of bringing to a speedy and unconditional end colonialism in all its forms and manifestations. The Union of Soviet Socialist Republics does not consider itself bound by the provisions of article 9 of the European Agreement supplementing the Vienna Convention on Road Traffic of 1968 or of article 9 of the European Agreement supplementing the Vienna Convention on Road Signs and Signals of 1968 under which disputes relating to the interpretation or application of the Agreements shall be referred to arbitration if any of the Parties in dispute so requests.


Sweden

  • Signature: 01-02-1972
  • Ratification: 25-07-1985 (R)
  • Entry into force: 25-07-1986
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    25-07-1985
    With respect to paragraph 22 of the annex, signs C, 3a to C, 3k shall incorporate an oblique bar. The reservations of Sweden to the Convention on Road Signs and Signals also apply to this Agreement. With regard to article 9: Sweden opposes that disputes in which it is involved shall be referred to arbitration.


Switzerland

  • Signature: 31-10-1972
  • Ratification: 11-12-1991 (R)
  • Entry into force: 11-12-1992
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    11-12-1991
    Annex, number 9 (article 10, paragraph 6, of the Convention): Switzerland reserves the right to provide in its national legislation, as an advance warning sign for sign B 2a , for an identical sign with an additional panel (model H, 1) as indicated in annex 1, section H. Annex, numbers 9bis and 22 (article 13 bis and annex 1, section E, subsection II, paragraph 7, of the Convention) Switzerland does not consider itself bound by the provisions of numbers 9bis and 22 of the annex. Annex, paragraph 12 (article 24, paragraph 2, of the Convention) Switzerland reserves the right to provide in its national legislation for the use of the three-colour system for light signals for pedestrians, in accordance with article 24, paragraph 2, of the Convention.


Ukraine

  • Ratification: 30-12-1974 (A)
  • Entry into force: 03-08-1979
  • Reservations / Declarations: Yes
  • Objections: No
  • reservation
    30-12-1974
    The Ukrainian Soviet Socialist Republic considers it necessary to state that the provisions of article 3 of the European Agreement supplementing the Vienna Convention on Road Traffic of 1968 and of article 3 of the European Agreement supplementing the Vienna Convention on Road Signs and Signals of 1968, under which States may extend the applicability of the Agreements to territories for the international relations of which they are responsible, are anachronistic and contrary to the Declaration of the United Nations General Assembly on the Granting of Independence to Colonial Countries and Peoples (General Assembly resolution 1514 (XV) of 14 December 1960), which proclaims the necessity of bringing to a speedy and unconditional end colonialism in all its forms and manifestations. The Ukrainian Soviet Socialist Republic does not consider itself bound by the provisions of article 9 of the European Agreement supplementing the Vienna Convention on Road Traffic of 1968 or of article 9 of the European Agreement supplementing the Vienna Convention on Road Signs and Signals of 1968, under which disputes relating to the interpretation or application of the Agreements shall be referred to arbitration if any of the Parties in dispute so requests.