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 Sidra plug-in US$750

Tool to support automatic VR Model creation by importing from an intersection design application

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This plug-in enables you to express intersections that are designed in the intersection design software Sidra (http://www.sidrasolutions.com/) with UC-win/Road. There is a data file for each individual intersection that is designed in Sidra, but it is only for a simple representation of one intersection, not for a complicated road network representation.

The output file is used for generating an accurate road axial sections, a traffic volume, and a timing of the traffic signals. Sidra data is configured with the compulsory input file of .sig, .dat and the optional output file (.dat).

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You can open the entry screen by selecting "Import Sidra Data..." under the "tool" menu while the Sidra plug-in is loaded. You can select an Sidra file and set up the importing parameter in this window. Basically, you create a new VR data when you import then import data from Sidra. You could import more than one intersection, but in that case, you would need to load each file.

There is information to define the road approaching to an intersection in Sidra input files.
The information contains a road name and one road direction in eight direction of north, south, east, west, north east, south east, south west and north west.

    In order to reconstruct the intersection, UC-win/Road creates separate road cross-sections for each approach path. All of the roads cross at the centre of the intersection. The origins of each road are located farthest from the intersection. Since each road has a unique number of traffic lanes and line width, UC-win/Road generates a new cross-section surface for each approach path. Some of the roads include siding bays and short traffic lanes for right and left turns. The length of those lanes are included in Sidra file. In order to add another traffic lane, UC-win/Road adds a transition cross-section at a distance from the intersection defined by the cross-section of the road including the new lane.

    The figure below shows the end section, where there are (1) a transition cross-section, (2) a new cross-section and (3) the end of the road.


    When there is an Sidra output file, UC-win/Road uses the information in the file to define the timing of each green, yellow and red phase of the traffic signal sequence. When there is no Sidra output file, UC-win/Road file tries to calculate based on the input file. UC-win/Road automatically sets up the traffic signal at the signalized intersection and faces the right direction.

    The Sidra file includes information regarding the traffic volume. This information contains the number of vehicles for each traffic lane and the volume of vehicles that make right and left turns. By default, UC-win/Road generates the traffic for each individual road. You can generate the designated traffic for each traffic lane in UC-win/Road by appointing the weight of the traffic lane at the lane change transition. For that reason, when the intersection to be imported has a road containing more than one traffic lane, the default cross section of UC-win/Road will be applied at the starting point of the road with a transition that leads into the actual road cross-section.

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This example is data that was only loaded from an Sidra file. We have plans to enable import from OSCADY-PRO by the Transportation Research Laboratory (TRL).

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