![]() You have both of these set to "height", and the latter might be overriding the first. There is another setting called "Object attribute for absolute height". You can set this attribute in the Generate Bridges dialog where it says "Object attribute for level". Look for this object attribute which says the ground street is 0, the first level bridge street is 1, the second level bridge street is 2, and so on. When downloading streets from OSM, it is likely that you already have an object attribute that specifies which level each street is. Here is the result of applying the Complete_Street.cga rule to the bridge.įor more information about the settings, please see the help docs: The Bridge attributes can be found in the Inspector. In the Complete Streets example (Help -> Download Tutorials and Examples), the Complete_Street.cga and the Advanced_Street.cga rules both offer options to create bridges with pillars underneath. The object attribute called layer is used to determine which street is on top of the other. The bike path will be elevated 5m above the road since Level height = 5. Select the streets and run the Graph -> Generate Bridges tool. For example, if you have yet another road on top of the bike path, then you can set layer=2 for that road. If there are other graph segments, you can specify different layer numbers. You can optionally create the object attribute "layer" on the other graph segment and set it to 0. Select the graph segments you want to make into a bridge (the bike path), and create an object attribute called "layer" with the value 1. This might already be specified if you've downloaded OSM data. If one street has a smaller street width than the other street, then the Generate Bridges tool will automatically decide to put the narrow street at a higher elevation, making it the bridge.Īlternatively, you can specify which street is at which level through an object attribute. One street is the elevated bike path, and the other is the busy road underneath the bike path. She is a very conflicted Mets/Dodgers fan.Consider these two streets which seem to cross each other but don't actually intersect (there is no graph node at the intersection). Aileen is always eager to hop on another flight because there are so many interesting projects and people, and she gets tired of throwing her cats off her computer in her home office in Long Beach, California. She is a regular at transportation conferences, where she finds that airport and mass transit engineers really know how to have fun. For ENR, Aileen has traveled the world, clambering over bridges in China, touring an airport in Abu Dhabi and descending into dark subway tunnels in New York City. Many of her experiences with engineers and contractors have inspired material for her alternative theater productions way, way off Broadway. Her work has appeared in the Los Angeles Times and New York Times. ![]() Her journalism training led to her first stories about transportation, working as a cub reporter with the Greenwich Time. She studied English and theater at Occidental College, where a reporter teaching the one existing journalism course encouraged her to apply for the LA Times Minority Editing Training Program. The model will be continually updated throughout the life cycle of the structure, from preliminary design through in-service inspections.”Īileen Cho, ENR's senior transportation editor, is a native of Los Angeles and recovering New Yorker. Adds Abu-Hawash: “Another major benefit is asset management. The goal of ending the traditional reliance on paper plans includes bringing added value in the form of higher quality, less-expensive changes and better coordination, says Christian. Another important task is performing an economic analysis to validate the return on investment, which is an important step to get buy-in from stakeholders.” This includes establishing requirements for key data exchanges for the life cycle of the structure’s model. “We are working on developing national standards and guidelines to facilitate its use by bridge owners and other stakeholders. The other is a design for the fabricator for that part of the bridge.”Ību-Hawash says the AASHTO working group identified Industry Foundation Classes as the data exchange schema for BIM for bridges and structures. One is the design to give to the contractor. Model view definitions are what we exchange with each other. “When I am a bridge designer, I want to hand that over to a contractor so he can bid on it I don’t need the entire schema. “Data schema represents anything you could build,” he notes. 3D models can potentially do that, says George Lukes, standards and design engineer with the Utah Dept.
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