Industry Problem: With complicated mathematical formulas and multiple guidelines to consider, civil engineers have found that designing a roundabout can be a time-consuming process.
CADLearning Expert Solution: Use Vehicle Tracking, which is now fully integrated inside of Civil 3D, to quickly and easily create a roundabout and test the resulting vehicular behavior in a transportation design.
In the first decade of the 21st century, American roadways experienced a huge surge in the number of roundabouts that were designed and built. When properly designed, roundabouts are an effective traffic-calming device – forcing vehicles to slow to a more manageable pace while maintaining traffic flows. But, when poorly designed, roundabouts can fail to slow traffic altogether, which can actually lead to an increase in accidents. With so many factors to consider, getting roundabouts just right is not easy.
Vehicle Tracking allows engineers to model and test vehicle behavior in modeled conditions. Engineers are able to select from a wide range of predefined vehicles, and then drive that vehicle through a series of required maneuvers in your model. The aim of Autodesk Vehicle Tracking is to provide accurate swept path predictions for different types of vehicles, not precise simulations of driving conditions for those vehicles. Therefore, the controls have been designed with the emphasis on ease of use, rather than realism.
Vehicle Tracking allows users to easily create 2D and 3D roundabouts that adhere to a variety of modifiable standards, and generate reports and place all of your designs in construction documents for your planning department or engineer to review.
When you create the roundabout, Vehicle Tracking will make its own assemblies and place them just above the ones you have already created. These assemblies will contain only the lanes of the roundabout, which means no curb and gutter, no sidewalk, or similar features. After the roundabout is made, you will need to edit the roundabout to adjust the lane width and not the subassembly lanes, because the roundabout is created from the edge of the lane alignment on each side of the road.
After you have set your parameters in Vehicle Tracking, the roundabout circle appears and is ready to be placed at the intersection. You may then edit the roundabout to suit your needs. Vehicle Tracking gives you a simple three-step process for creating a roundabout in Civil 3D.
- Heidi Boutwell, CADLearning Infrastructure Content Manager
CADLearning Playlist of the Week: Automate Roundabout Creation
- Working with Corridors
- Creating a Corridor
- Creating a Roundabout
- Editing a Roundabout
- Adding Speed Striping to Roundabouts
- Modifying the Roundabout Standard Library
Did You Know?
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Send us your suggestions for future Did You Know solutions.