The open-for-traffic temperature for the newly-constructed or rehabilitated asphalt pavement is regulated to cool down until when it is below 50°C (122°F) in Taiwan. However, the pavement temperature of surface layer can exceed more than 60°C around 2PM in summer. This study was to evaluate the various open-for-traffic pavement temperatures in conjunction with the wheel-tracking rutting device in the laboratory. A 19mm DGAC with viscosity grade AC-20 asphalt binder was designed in accordance with the AI MS-2. The asphalt cylinders with 100mm in diameter were compacted for the indirect tensile strength test and asphalt slabs were manufactured for the Hamburg wheel tracking rutting test. In addition, the viscosity test performed by the rotational viscometer was studied. It is suggested that the current regulated open-for-traffic temperature-50°C (122°F) can surely provide a sufficient structural strength to support the traffic flow. The approval-based artificial cooling methods may be considered alternatively for roadway agencies to open for traffic based on the literature finding, but adverse effects are required to assess in the future.