From the 1980s, new telematic technologies have meant a great evolution in several areas. In the transportation domain, their use has implied the development and implementation of several intelligent transport systems (ITS). However, these deployments were done in an isolated way. Traffic managers, public and private organisations, stakeholders and others have implemented ITS without much perspective, that is, without providing ITS as services for end users. In the last few years, several European Union (EU) funded projects have been dealing with the development of harmonised ITS services. For example, the EasyWay Project is involving most of the European countries (EU member states and others) to deploy harmonised ITS services taking into account the European citizen as the final target. In this study, an introduction of the EasyWay project is made, including the ITS concept services and the deployment guidelines for harmonisation. In November 2012, EasyWay presented a new version of DGs, which were approved with minor editorial changes. An overview on these DGs for the ITS services is presented and two real Spanish road traffic ITS services are analysed.