Now-a-days, we have seen a tremendous increase in technology. We are already aware of the increase in transportation due to several factors like schools, offices, factories, etc. This usage of own vehicles can lead to a lot of increase in transport. This leads to pollution Compared to the usage of own vehicles it can lead to rapid increase in traffic. mainly this growth is happening in Urban areas. To decrease this, we have to implement some techniques. In this paper have discussed about the modern days traffic monitoring system and how wireless sensor network will involve in these areas.