If you just need to view it offline. Click get file for offline use and you should get .zip file.
Unzip it and open html file with your browser. (the instruction is available as email message  if you decided to received it via email.)

You can download the java source code,too!
The file you have download should be trafficControl.java instead of php file.
The file can be open with any text editor, it can be compiled into java class code.