Not Enough Roads is a geometry node for blender to simplify creation of roads on curvy surfaces.

Not Enough Roads transforms simple curves drawn on your terrain into detailed roads which snaps to surface. Offers a wide range of customizable parameters to generate flexible roads scattered with vegetation and other elements with optimization options.

Main Points:

• Versatile Road Shape: Manipulate width, height and other shape settings to seamlessly fit your landscape.
• Environmental Elements: Fences, light poles, and utility poles, each with adjustable positioning and spacing to fit road.
• Camera and Distance Culling: Drastically optimize vegetation's performance in large scenes.
• Realistic Materials: 2 materials + winter variants fulfilled by adaptive subdivision.
• Ready Presets: Ready to use 4 presets
• Custom Scatter Node: A separate, configurable geometry node allows to scatter any collection of objects along a curve. Can be layered by duplicating node and using different collections.
• Vegetation Assets: Ready to use trees and grass models.
• Partial Intersection Support: The tool allows you to draw roads crossing each other without merging into single mesh.

You Receive:

• Geometry node for generating road from curve.
• Geometry node for scattering instances on road.
• Geometry node for flattening landscape for road.
• Basic vegetation assets and road elements.

How to Use:

• Download the .blend file.
• Append the “Not-Enough-Roads-v2” collection into your scene. This will import 4 predefined presets.
• Choose the preset you need and start editing the appended road by drawing\extruding the curve or select another curve in modifier menu.

• Please check documentation page for important notes and nodes description

Additional Notes:

• Some assets used from Poly Haven

Changelog:

Version 1.0

• Release

Version 2.0

Improvements:

• 99% reduction in time for detecting intersections.
• Precise topology controls.
• More realistic materials.
• Seamless and tileless material for path and asphalt.
• A better quality of road assets and vegetation.
• Accurate vegetation distribution due to new topology.
• Additional node for smoothing terrain. 
• Simple wind simulation.
• More intuitive camera culling settings.
• Instances do not spawn on path/asphalt.
• Improved flattening option to fix road's tilt on slopes.

Limitations:

• No mesh merging at junctions.
• Compatible only with blender due to high procedurality.
• Might not be suitable for city streets without manual curve adjusting.