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Road Architect for Unity. Road architect is a professional quality road system creator featuring dynamic intersections, bridges and many other road objects.

Now with HDRP support: Check the hdrp branch for details.

Working with 2018.3.0. If interested in contributing contact




  • Dynamic Procedurally generated based upon lanes, road width and angle of attack.
  • Turn lanes Complete left and right optional turn lanes.
  • Traffic lights Fully functioning and heavily detailed traffic light system including left on yield and right turn lane only lights.
  • Assets Includes several assets such as traffic light poles, street lights, traffic lights, stop signs and more. Most include rigid body versions for dynamic environments.



  • Bridge wizard Allows for instant creation of professional quality bridges such as causeway, arch, suspension and more. All bridge creation aspects are generated instantly allowing quick iteration.
  • Customization Custom extrusion allows for mix and match of bridge parts. Over 50 bridge parts included.
  • Details Many different types of railing, bases, center dividers included.
  • Curvature Curvature of bridges supported including arch and suspension bridges.

Railing and extrusions


  • Railing 12+ Railing types included such as K-Rails and W Beams.
  • Center dividers Many center divider options including the most popular configurations such as K-Rails with blinders or street lights. All aspects of mesh extrusion are performed instantly allowing quick iteration.
  • Collision barriers Water barrels and other collision barriers come with prefabricated rigid or static body configurations.
  • Custom extrusion Extrude any custom mesh along the spline with almost limitless customization.



  • Road assets several road assets included such as street lights, double lights, stop signs and more. All aspects of road asset placement are done instantly, allowing for quick iterations.
  • Custom assets Place any custom mesh along the spline with an extreme amount of customization options.
  • Signs 300+ U.S. federal and state road signs are pre-built and available for use.
  • Future assets Assets will be added and freely available as time progresses.



  • Speed All mesh extrusion, bridge extrusion and road asset placement actions are instantaneous. Optimized road generation results in an average 100ms per (2km road + 1 intersection). Multithreaded support.
  • Quality Most road textures at least 1024x1024 resolution. Most materials include normal and specular maps. Most assets created to federal or state specification.