Project Assist AI, an integral component of Corridor EZ for Civil 3D, unleashes the power of AI for subdivision road design by:

  • Analyzing your alignments
  • Deducing your design intent based on the naming convention used and learning as you make adjustments
  • Adding automation to the more complex processes such as widenings, bus bays, parking lots, knuckles and islands
  • Allowing new designers to become productive quickly and being able to share designs with senior designers
  • Maintaining compatibility with your existing production standards by automatically generating your profiles, surfaces, feature lines and pipe networks

Watch this brief video to see Project Assist AI in action.

More about Project Assist AI

You begin with an existing ground surface and then in Civil 3D:

  • Create alignments for the road centerlines
  • Create alignments for widenings, turning lanes and bus bays
  • Create alignments for knuckles, parking stalls and islands
  • Identify the location of all cul-de-sacs

When you activate Project Assist it will read all alignments and provide you with a form displaying the alignments and what it believes you want to do with each.

PA-Design Intent

Once you confirm the Alignment Usage, another form is generated defining the actual workflow. You can review each proposed action as shown below:


It is in the workflow form that you can fine tune your design intent:

  • If you have a custom alignment for a cul-de-sac – you can define it here with the “is cul-de-sac” option
  • If you are defining the curb return for a parking lot you could create a separate alignment and assign a curb return template
    • This gives you full control on the vertical design once created


Many subdivisions have standard cul-de-sac definitions which can be defined in the Project Assist settings. Cul-de-sacs can be added to a road by checking Add cul-de-sac box. These can subsequently be updated or modified by using the cul-de-sac edit option within the core software.

AI for Subdivision Design

Once confirmed – Project Assist will automatically build out your design and then generate a PDF file describing each step taken in the design along with links to videos that show exactly the actions taken – a great training tool for new users.

Project Assist PDF Report

Below is the preliminary design that Project Assist generated for this subdivision in under 5 minutes.

AI for Subdivision Design

Corridor EZ for Civil 3D generates the vertical design of the entire network with all curb returns dynamically updated as design changes are made. It also provides an intuitive user interface allowing you to:

  • View and edit the design profiles
  • Examine and edit Cross Sections directly
  • Generate your Civil 3D profiles directly when needed
Corridor EZ for Civil 3D


Project Assist AI, an integral component of Corridor EZ for Civil 3D, unleashes the power of AI for subdivision road design. Using a best-in-class AI engine, it analyzes your alignments, understands your intent, and automates complex tasks. New designers get productive fast and maintain existing standards with automatic profile, surface, and network generation..

Maintain quality, even when deadlines loom! Project Assist AI guarantees consistent, high-quality subdivision road designs. New designers deliver professional results, while veterans streamline their workflow without compromising quality. Embrace the future of subdivision design with Project Assist AI.

There are many more innovative features in Corridor EZ for Civil 3D. You can learn more at

Discover More About Corridor EZ for Civil 3D