there are replacement road textures at avsim.com that have colored textures on the roads for traffic, but nothing moves, and if you really look you can see how fake it looks unless you're high up. anyway the road textures themself are very nice and you have options of no traffic-high traffic.
I was flying under a bridge repeatedly near my home 'drome (nothing better to do ) and I'm positive I saw traffic. Perhaps if autogen and dynamic scenery are maxed out; you may see it.
You could probably create some cars and use afcad and ttools to create traffic routes, but you might have a hard time making them go up the hills instead of through them.
Windows XP SP1 Motherboard: Epox 8RDA + main board Processor: AMD XP2500 Barton CPU Memory: PC2700 1gb Geil DDR Hard Drive: SEA HDD IDE 40GB 7M 40GPP Hard Drive: Western Digital 40gb 8mb cache Monitor 15 LCD Flat Panel Displa
the problem with road traffic is the frame drop down....otherwise it would be so nice to see cars, trains, buses all around! I've never saw moving lights on the roads.
If I remember correctly, some scenery work I did with the freeware "Airport" designer had moving lights on the roads that you would insert with that. Only on the "major roads" I think.
As to the default fs2004 program.... I cannot say that I have ever seen moving lights on the roads anywhere. And all sliders are fully maxed in my setup now.