In this study, Arduino microcontroller based traffic signalization automation system that is remote-manageable with a web service is presented for duration scheduling of traffic signal lights. In this realized system, it will be possible to adjust the light durations dynamically over the internet. Thus, during sudden moments of intervention, a great convenience and speed will be ensured for updating the durations of the lights. In the study, a prototype is designed on the breadboard and the results are observed on this prototype. Furthermore, users can be able to control the traffic signals through the internet by the designed interface applications. Therefore, significant gains are predicted for the traffic signalization systems in terms of time and financial costs.