A while ago I simply downloaded the Network Addon Mod and haven't done anything else with it. I noticed it did help a lot with Sims walking to my multitude of bus stops, and transit use has increased, but otherwise I haven't played with the NAT.
The Ground Light Rail intrigues me but I'm confused as to how I use it. I have a grid pattern of avenues in my large cities, so ideally I would like to lay down GLR in the medians with stations every few blocks. Do I need extra downloads, and what are the steps to accomplish this? Thanks!