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7250 N. 16th Street, Suite 300 |
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Transportation Modeling |
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YMPO
2006-2029 Regional Transportation Client: Parsons Brinckerhoff
Quade & Lima & Associates updated the 2002 YMPO TransCAD model for 2004 existing and 2029 future conditions. Once the traffic analysis zones were revised and socioeconomic variables updated, a 2004 model network was developed by updating the original model and validating it to the 2004 average traffic counts. Model runs were made for the current year, and output traffic volumes, speeds, and vehicle-miles traveled were produced. A new TransCAD model interface was also developed, and the new model was used to estimate traffic volumes for 2029. The new 2029 network constituted the future base network, and several roadway alternatives were then coded and evaluated. PM-10 conformity analyses were conducted for 2004 and 2029 build and no-build scenarios, and total vehicle emissions were computed based on estimates of vehicle-miles traveled for paved and unpaved roads. Similar steps were taken to extrapolate 2016 socioeconomic data, develop a 2016 network, develop model runs for the 2016 no-build and build scenarios, and perform air quality analysis for both scenarios for 2016.
Client:
Olsson Associates Lima & Associates provided the Lincoln MPO with a fully functioning and credible land use/transportation daily travel demand model developed in the TransCAD environment with a multi-modal framework. First, the traffic analysis zone (TAZ) structure was revised and new socioeconomic data was developed for the new TAZ structure. The network was then updated to include 2003 roadway improvements and the new TAZs. In converting and updating the model data and parameters, a procedure was developed to allow for sketch planning multi-modal considerations within the model, and rail crossing delays had to be considered to reflect impacts of train delays and provide the most accurate model forecasts. After developing and testing the TransCAD model, Lima & Associates then evaluated the future conditions. Population, occupied dwelling units, and land use estimates were incorporated into the transportation model and maps were prepared to display the data. Future year transportation networks were developed for a no-build condition, a base future condition, and several other alternatives. Traffic assignments for the future horizon year were then developed using the future socioeconomic data and roadway networks. Finally, using the TransCAD model output data, Lima & Associates developed an MS Access application to analyze PM-10 and carbon monoxide for air quality.
South Mountain Freeway Environmental Impact Statement and Location/Design Concept Report
Client:
Subconsultant to HDR Engineering, Inc. Lima & Associates developed traffic projections and performed traffic analysis as part of the development of the purpose and need statement. The firm updated demographic data in the study area to include the most recent proposed developments, and updated the street network. In addition, Lima & Associates provided the demographic and network input data for the regional EMME/2 travel demand model. Output of the travel demand model was analyzed to identify congested areas and possible solutions. Roadway alignment alternatives were evaluated to identify the location of the facility. In addition, multimodal alternatives were defined and evaluated in order to determine the preferred alternative. A comprehensive traffic analysis was then conducted for the preferred alternative. |
