I have been using that website to monitor Jakarta's traffic. The website allows us to use cameras that are installed around Jakarta! Imagine you can look at what is really happening in a certain street/road in Jakarta.
With that, I can decide whether or not to go back home at a particular time. Lately, Jakarta has a very bad weather. The rain and the flood make Jakarta's traffic get worse. This website helps me a lot! Why don't you try it yourself?! see if it really is helpful :)