![]() I will then enter an offset distance of 12 feet for each. Since these offsets represent lane edges, I’m going to go with one to the left and right. I can create as many as I want and I can come back later and add more if necessary. Below I can select the number of offsets I’d like on the left and right side. Note, I can use these toggles to assign a specific starting and ending station. I’d like the offsets to run from the start to the end of the station range. I’d like my offsets to be parallel to the main street alignment. I can then use this dialogue box to define my offsets. I’ll do that my selecting the parent alignment and then from the contextual ribbon I’ll choose offset alignment. Instead, I’m going to create my offset geometry using offset alignments. Let me press escape, I’m going to delete the poly line, I’ll select that and press delete. That being said, the poly line is static, so if your design were to change, you would have to update this offset geometry manually. Now this poly line can certainly be used as a target. ![]() At this point, you’re probably aware if you were to launch the offset command and enter a lane width, you can select a civil 3D alignment and offset it to create a poly line. Let’s also say that I would like to create some horizontal targets that I can use to drive the widths of the lanes. Let’s say that this alignment represents the center line of a proposed two lane road. On my screen I have a sample alignment called Main Street. In this session we’ll look at how to assign widenings to civil 3D offset alignments.
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