CASE STUDY

Project Summary Organization: New Travel Demand Model for Western Cape Government Department of Transport and Western Cape Province Public Works (DTPW) Solution: CUBE filled data gaps, employed innovative modeling techniques, offered integrated Land Use, Freight, Roads and modeling tools, and created local experts for continued success Highways, Public Transport Location: Cape Town and Western Cape and travel model system, training DTPW staff, and creating Region, South Africa The Need local expertise by working with WCG and Cape Town during a Project Objective: Western Cape is one of the largest regions in South Africa, • Develop an integrated model covering the southwest quadrant of the country and focused three-year development period. system to estimate personal on its major city, Cape Town. The province includes 24 other travel, commercial (goods) travel, The Method and land-use development. municipalities that are home to three major universities and Developing a brand-new land-use and transport integrated • Receive training to create some of the most productive areas in the world for growing local expertise. grapes for winemaking. The region has around 6 million model system from a “clean sheet” is always a challenge, • Receive assistance and coaching people and is one of the most diverse, progressive, and as such models require significant levels of specific types of for the implementation and economically strong regions in the country. data on land-use, demographic attributes, and existing travel application of the model. behavior, much of which was unavailable in the study area. Products Used: There is a growing concern over the transport linkages CUBE Voyager, CUBE Land, between Cape Town and the surrounding towns, the ability of The model development team analyzed and combined data CUBE Cargo the current transport infrastructure to accommodate growth, from several sources, including Esri SA, Statistics South and the economic necessity for roads that can adequately Africa (Stats SA), the 2011 Nationwide Household Travel Fast Facts handle goods movement. In addition, the long-lasting effects Survey (NHTS) and several other local surveys and data of apartheid are having a significant impact on current and • Due to the unavailability of data, providers. The study team also utilized similar surveys in many of the parameters describing future development patterns. With these considerations in the U.S. and Europe, and the City of Cape Town also traveler behavior and sensitivity mind, the Western Cape Government Department of Transport were transferred from other areas, contributed substantial data for the development of both with appropriate adjustments to and Public Works (DTPW) decided to expand its role in the transportation and land-use models. reflect local conditions. infrastructure management and development and to take a • The team employed an innovative more forward-looking and performance-based approach to The Western Cape Land-Use Model (WCLM) includes several Simplified Tour-based Modelling components in the model system. In the province, different (STM) methodology, pioneered by transport planning. CUBE experts. rules apply to development within the city limits of Cape • The resulting STM model structure The Project Town and the areas outside the city. In addition, the model is one of the most complex and DTPW knew that they wanted a comprehensive, integrated accounts for the part of this area’s households and jobs that complete of its type. model system - one that would estimate personal travel, are considered outside of government control. This segment • The model includes person travel commercial goods travel, and land-use development. Much and goods movement, as well does not always respond to normal economic forces and as an integrated land use model, of the data that such projects typically require, including requires special treatment in the model. organized in a sophisticated demographic attributes and descriptions of existing travel feedback system that accounts for For the transportation model, the team applied a new process land use/transport interaction. behavior, was unavailable for this project. As a result, many of the parameters describing traveler behavior and to overcome issues associated with the aggregate four-step ROI sensitivity were transferred from other areas with appropriate trip model structure and employed the STM methodology. • Performance-based planning that adjustments to reflect local conditions. One of the first STM, pioneered by Bentley experts, has been implemented results in more efficient and effective steps in this process was to develop a land use/transport successfully in several U.S. cities and was the approach delivery of projects and services. model that would provide provincial planners and decision- selected for the new Western Cape Travel Model (WCTM). • Results are transferrable between This approach addresses problems of aggregation error different urban areas. makers with objective information on which to base sound infrastructure decisions. DTPW selected the CUBE suite of and inaccurate estimation of non-home-based travel. It is • CUBE ensured that a complete modeling package would be put integrated software for this project along with a services also more efficient with much shorter run times than other into place with training, support, contract that included developing a new freight, land use disaggregate methods. and documentation. Beyond the person STM has two major components: demographic Why Cube? travel model, CUBE’s (household synthesis) and travel behavior (demand The entire model system is applied using CUBE Cargo, estimation). The development of WCTM began by suite of interconnected CUBE Land, and CUBE Voyager scripting and no external creating a complete travel model structure. programs are required. The WCLUTI model has been set up products enabled using CUBE’s Application Manager user interface, which Western Cape to utilize This included: provides an easily understood flowchart-style interface with the same data and specific user-editable variables to help define scenarios. • A new traffic analysis zone (TAZ or “zone”) system infrastructure to create Beyond the person travel model, CUBE’s suite of models of freight • A complete set of zonal socioeconomic data interconnected products enabled Western Cape to utilize the same data and infrastructure to create models movement and land • A roadway network of freight movement and land development. development. • A description of the various public transport (PT) system The WCLM utilizes the CUBE Land module, which uses components, particularly a special treatment of the an econometric bid-rent system to forecast the location informal minibus-taxi system that provides a significant choices of household clusters into zones and dwelling types, Find out about Bentley level of transport service throughout the province. at: www.bentley.com and firm/establishment types or employment allocated to lot sizes or workplaces in the same zoning system. Contact Bentley 1-800-BENTLEY (1-800-236-8539) Process for Simplified The Western Cape Freight Model (WCFM), utilizes Outside the US +1 610-458-5000 Tour-based Model the CUBE Cargo module based on the production and Global Office Listings consumption of all types of goods on a nationwide basis. www.bentley.com/contact 1. Household Synthesis 2. Tour Frequency Stakeholder/End User Benefits 3. Tour Destination Choice With CUBE and its established STM process, Western Cape 4. Mode Choice and the trained pool of local experts have refined the models 5. Intermediate Stops and have achieved: a. Number of Stops b. Stop Location • Improved roadway and PT network coding, 6. Time Period speed estimation, and assignment validation 7. Trip Accumulator/Assignment • An integrated solution providing quantitative scenario analysis results for Land Use, Freight, and Transport

Key Input Variables • Improved summary reporting

• Population • Service Employment • Development of forecast year data • Households • Other Employment • Improved identification of goods movement logistic • Average Household • K-12 School Income Enrollment centers and production/consumption estimation • Retail Employment • University Enrollment • Continued training of DTPW and city staff • Office Employment • Zonal Area In addition, the consulting team is helping DTPW integrate • Industrial Employment • External Station Volumes the model system into its new performance-based transport planning infrastructure by identifying potential uses of the model (e.g., long-range plans, corridor studies, PT studies, sub-area/municipal planning) and communicating the value Based on the person travel model, Western Cape was of this analysis throughout WCG agencies. able to utilize the model infrastructure to then conduct Goods Movement and Land-Use analysis. Contact us to see how you can achieve similar results!

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