Article 11
1. By the dates referred to in the second subparagraph of Article 7(7), the Commission shall present a report to the European Parliament and the Council on the implementation of this Directive, taking account of developments in technology and traffic congestion. 2. Member States shall forward the necessary information to the Commission no later than six months before the dates referred to in paragraph 1 in order to enable the Commission to draw up the above report. 3. Member States introducing electronic toll and/or user-charging systems shall cooperate with the aim of achieving an appropriate level of interoperability.