Spline roads and airfields are layed to make your own road network or as i have used them to attempt to show a more realistic layout as per Hawkinge.Check this thread ..
http://simhq.com/forum/ubbthreads.ph...ml#Post3349192
When you lay the first point of the road you will get a 1 and an OR appear on the map, sometimes you may have to zoom out to see the OR point.Lay your second point a bit further away, then when you move the OR you will see how it affects the shape of the road.As you continue to lay points you always get two more , an L and an R .These you can move and create corners , dodge around houses ,trees etc.
You can virtually make any shape you want with tem. If you check that thread you will see all the dirt roads i have layed ,the roundabout asphalt road thingy near the main buildings as well as the grass runway circles on the field.Takes some time to get the shapes right but it is worth it to get a more historical look.
