Bandwidth Requirements and Tips for Using TrainTool
Required bandwidth
It turns out to be very difficult to make a firm statement about this, because it depends on many factors that are not so much related to the bandwidth. Stability (i.e. low packet loss and limited latency) usually turns out to be more important than the available bandwidth . Nowadays almost everyone's internet is faster than 10 MB/s, which is enough to use TrainTool without any problems.
As a guideline you can assume: if you can play a YouTube video at 720p without loading, then you will have no problems using TrainTool.
Tip: If you are not sure about your internet speed, you can always check your current speed on fast.com.