How it's done
This is how I reconstructed the runways and taxiways.
Each runway is constructed by a row of square prims (in this case 20x20m at left and 25x25m at right)with default scaling at 1.0x1.0. This allows the builder to scale the runway up or down by changing the size of the squares and (assuming you have the correct option ticked) the textures will scale to that. This works because there's an expected order of those textures and standard appearance.
The taxiways are different. Each non-curve starts as a 10x10m, but texture scaling is planar at a scale of 0.1x0.1. If you want a longer straight you just pull the prim longer.
There's a sharp curve that does a 90° turn in a 10x10m prim, but I also created a set of gentler curves by putting the straight texture on top of a torus and having it run in a circle instead. You have use default scaling on the text (1.0 on the width, any reasonable number on the length), and adjust the size of the hole in the middle to match a 10m wide straight. Then it's just a matter of fiddling with B and E in the Path Cut.
The beauty of this technique is that it should work fine with regular roads and streets as well. No doubt this is reinventing the wheel for the umpteenth time, but it works.
How it's done
This is how I reconstructed the runways and taxiways.
Each runway is constructed by a row of square prims (in this case 20x20m at left and 25x25m at right)with default scaling at 1.0x1.0. This allows the builder to scale the runway up or down by changing the size of the squares and (assuming you have the correct option ticked) the textures will scale to that. This works because there's an expected order of those textures and standard appearance.
The taxiways are different. Each non-curve starts as a 10x10m, but texture scaling is planar at a scale of 0.1x0.1. If you want a longer straight you just pull the prim longer.
There's a sharp curve that does a 90° turn in a 10x10m prim, but I also created a set of gentler curves by putting the straight texture on top of a torus and having it run in a circle instead. You have use default scaling on the text (1.0 on the width, any reasonable number on the length), and adjust the size of the hole in the middle to match a 10m wide straight. Then it's just a matter of fiddling with B and E in the Path Cut.
The beauty of this technique is that it should work fine with regular roads and streets as well. No doubt this is reinventing the wheel for the umpteenth time, but it works.