Investing in Road Transport Telematics (RTT) projects should be carefully evaluated to see if they are worth it. Different methods are used to assess RTT projects, like looking at technical performance, user opinions, safety impacts, and costs. The European Union's Transport Telematics Applications Programme uses these methods to decide on RTT investments. It's important to systematically evaluate and assess RTT projects before investing in them. Key areas of assessment include technical performance, user acceptance, impact on safety and efficiency, socio-economic factors, financial aspects, and market perspectives. Current issues in evaluation and assessment include market analysis, private funding, and evaluating enforcement and regulations. Overall, evaluating and assessing RTT projects is crucial for making informed investment decisions.