Feature-based Modeling Ensuring Accurate Representation of Existing Infrastructure
The software enables users to create intelligent, 3D topographic models containing track information, terrain data, railbed, and related site features. The model 
may also contain other corridor features – roadways, utilities, drainage, and so on. Intelligent features are visually distinguished by structure, style, and graphical symbology. Surface models are formed using proven and tested triangulation methods and may represent existing topography, design, or a combination thereof. Intelligent modeling allows users to incorporate features such as rails, ballast edges, drainage, and other topology into the model. Features may be non uniformly occurring points or breaklines that represent connected linear segments – ridges, edges of ballast, and roadways for example. Interior voids (holes) may represent building footprints, lakes, or areas of null information. Models may be bounded by an exterior boundary feature formulating the exact edge of modeled or collected data.
Powerful 3D Modeling for Streamlined Corridor Design and Improved Decisions
Bentley Rail Track offers in-context, smart design of 3D rail corridors with Roadway Designer. Roadway Designer streamlines the complex development of 
virtually every aspect of a corridor in a single, parametric presentation. Users can travel along a corridor viewing and dynamically designing closed shapes that represent “man-made” materials – such as ballast, sub-ballast, sleepers, and related structures – in concert. The software automatically produces dynamic volumes to aid in balancing cut-and-fill.
Roadway Designer displays four-port views of the design in plan, profile, cross-section, and cant or superelevation. As work progresses, users experience immediate visual feedback in all views. Rail corridors are easily modified by direct manipulation of parametric graphical components or by precision input in context-sensitive dialog boxes. The unique features of Roadway Designer allow users to target known existing features, enabling models to conform to on-ground demands. As designs develop, color-coding displays potential problem areas. Roadway Designer enables users to test design decisions before they are applied.
Roadway Designer offers state-of-the-art design automation. From horizontal alignment, vertical alignment, and surface information, the software generates 3D models of the full track corridor using user-defined typical sections including earthworks or end conditions. The software automatically ensures conformance to standards as it speeds the corridor development process. When widening sub-ballast and subgrade, Roadway Designer automatically creates transitions according to user design criteria. Users can interactively edit cant and superelevation on the fly.
Users easily modify and create intelligent design components – no programming required – and apply design constraints for sleek control of the 3D parametric modeling process. Components can be open- or closed-shape and include multiple construction layers, barriers, slopes, and ditches. Roadway Designer automatically creates surfaces for generating cross-sections, performing volume calculations, and aiding visualization and rendering. Users can also merge components to create a single surface or create a surface of the entire rail corridor.
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