Hi
Pware's answer is not so bad;)
It's not possible to change the carz's speed individually. But you can change the speed of ALL the cars on a spline road.(y)
Hi
You can include the night-mode in lods levels if you want to have it at all levels. You have to name it as you can see below:
trainz-build 3.5
mesh-detail-level-count 3
mesh-table
{
day-lod0
{
mesh...