Value of the data •The data base provides an extensive picture of the road traffic noise in the urban area of Greater Thessaloniki Area. •The dataset gives the opportunity to researchers for comparing and validating the noise assessment methods with the actual noise measurements. •The data can be used to develop the strategic noise mapping and action plans. •The noise metrics are essential for the policy makers and risk managers to judge the necessity of taking noise prevention methods or mitigation measures and to evaluate the effectiveness of these measures. •The data can help to establish the environmental noise limit values for the health protection.