In addition to experimenting with the speed of your cloned road, add in this here to the config.txt:
[h=3]Additional Tags[/h]isfreeway
0 = asset can be a road or rail track1 = asset will be a freeway model allowing the use of and multi-lane roads numlanes The number of lanes to be generated.
Default lane spacing is 3.4 metres.Note that for kind track, traffic will flow in one direction for all lanes.
isfreeway works like expected and you need to drag the roads in the opposite way of travel when placing them down.
For roads with no traffic, so you can place static vehicles, set the carrate to 0. If you do this, don't attach the road to an active road, otherwise, you'll have traffic on the no-traffic road.