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Roadway alignments on OpenBrIM can be defined in two ways: users can either import an alignment or define it using OpenBrIM objects. Refer to the below page to import alignment from the LandXML file; Import Alignment (.landxml) [QG-2]
When you click on the Roadway Alignment subtitle under the Bridge Geometry title, the columns for Name, Start Station, Start Azimuth, Latitude, and Longitude should be seen. Start Azimuth (Optional): This parameter defines the orientation of the roadway relative to North. For instance, an azimuth of 0° points towards North. Latitude (Optional): Latitude can be used to define the geographical characteristics of the start point of the structure/alignment. Longitude (Optional): Longitude can be used to define the geographical characteristics of the start point of the structure/alignment.
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The actual location of the alignment does not need to be stored.
After making the required definitions, further definitions for Roadway Alignment must be made. When you click on Start Station column’s cell, then appearing three dots, it will lead to options that can be used to further define the related parameter. For the case of Roadway Alignment:
  Horizontal Alignment Segments:
 Spiral(Transition) Segments: Alignment spiral segments refer to a type of curved segment used in road and railway alignments. Spiral segments are used to transition smoothly between tangent segments and circular curves in the horizontal alignment. They consist of a variable radius curve that gradually changes from a tangent to a circular curve or vice versa. Requires the following parameters:
 Vertical ProfileThe vertical alignment of a road refers to its profile or its projection onto a vertical plane. This involves determining the elevation of the roadway at various points along its length to create a smooth and safe vertical path of travel. The vertical alignment is typically defined by a series of grades or slopes that connect the high and low points of the roadway. The slope and length of these grades are determined by factors such as the terrain, the drainage requirements, and the sight distance requirements. Here are the required parameters for vertical elevation points:
A parabolic or cubic curve is then fitted between these points to establish the vertical profile of the alignment. For the vertical profile computation of the alignment, OpenBrIM doesn't require the point of vertical intersection (PVI) - the point at which two tangents intersect. Users can specify the vertical profile by entering the PVC (Point of Vertical Curve), PVT (Point of Vertical Tangency), and grade values at those stations. 
Transverse (Superelevation)
Users can define superelevation by specifying one or multiple Cross Section definitions as part of the alignment data at various stations.
 When defining a cross-section in OpenBrIM, users need to use a Cross Section object which must contain one or more Cross Section Segments to describe the shape of the roadway at a specific station. The Cross Section Segments should be stacked from the left side when looking up station. This means that the leftmost segment should be specified first, followed by the segment to its right, and so on. Each Cross Section Segment specifies the transverse slope of a section of the roadway and its width. By stacking multiple Cross Section Segments, the user can define a complex cross-section that accurately reflects the roadway shape at a given station. Here are the required parameters for each Cross Section Segment:
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