Dug out my old copy of SimCity4 recently. I may even update my Negishi region at some point (or place the files online for download again). I had to pull them in the past due to bandwidth issues, but I now have a lot more bandwidth then I used to.

One of the big questions for me is figuring out transit speeds. Since I have the NAM mod installed, the pathfinding system is much better at locating the "fastest" path rather then just the "shortest" path.

List of transit times in SimCity 4

"Rail" Transit
200kph - Monorail
150kph - Subway / Elevated Rail
110kph - Passenger train

Note: I've seen other place say that freight trains are 110kph and that passenger trains are 150kph.

Bus Transit
100kph - Highway
60kph - Avenue
46kph - Road / One-Way
31kph - Street

Note: Bus transit speed is faster then cars so that the pathfinding algorithm prefers them over cars.

Cars (and probably freight trucks)
82kph - Highway
40kph - Avenue
31kph - Road / One-Way
21kph - Street

Pedestrian Traffic
3.5kph - Avenue
3.5kph - Road / One-Way
3.5kph - Street