The Complete Guide to Traffic modules are available in a streaming format or as a download or DVD application that can be installed on to your computer.

With the streaming version of The Complete Guide to Traffic modules you get 1 years access to each module, but these can be see on any internet connected, flash compatible computer by yourself.
With the download version, you can install the training modules on your local computer, and there are no expiry dates.

However, the download version of The Complete Guide to Traffic modules are licensed to be installed on just the one Microsoft Windows computer, so you will need to be at that computer to see the module. The other difference is that once the module is installed you do not need to be connected to the internet. This can be more convenient in certain situations. :)

On the DVD version of The Complete Guide to Traffic, you get the download version of the module, and a Flash version of the module that can be viewed on a PC or Mac computer.