TransCAD is the only software package that fully integrates GIS with demand modeling and logistics functionality. Unlike other GIS software products, application modules in TransCAD are fully integrated with GIS functions for improved performance and ease of use. TransCAD can also solve problems of virtually any size. This makes TransCAD ideal for many types of transportation applications including:
Network analysis models are used to solve many types of transportation network problems:
Transportation planning and travel demand models are used to predict changes in travel patterns and the utilization of the transportation system in response to changes in regional development, demographics, and transportation supply. TransCAD is the only planning package that is GIS-based and fully integrates GIS and planning tools for trip generation, trip distribution, mode split modeling, and traffic assignment. TransCAD includes all of the traditional UTPS models, quick response models with reduced data requirements, and advanced disaggregate demand models.
There is a new master, multimodal equilibrium traffic assignment procedure that simultaneously assigns cars, trucks, and buses to the road network. There can be multiple user classes for cars (e.g. HOV users) as well as different classes (e.g. sizes) of trucks. This procedure includes the option of using exact entrance to exit tolls by vehicle class and differential values of time to be used in calculating generalized cost. Network exclusions keep each class of traffic restricted to the links that it is permitted to use. Some vehicles, such as fixed-route buses, can be pre-loaded on the multimodal network. Among the reporting options is a breakdown of link traffic by vehicle class and type.
For more information, see the Planning and Travel Demand page for a comprehensive overview of the travel demand capabilities of TransCAD.
TransCAD also has special tools and procedures for creating and working with transit networks. Transit fares can be specified as either flat or zonal. Using transit networks and fare structures, you can solve shortest path problems and calculate transit path attributes (i.e. skims). You can also have separate and fully integrated networks for non-motorized travel modes. For example, you can include pedestrian links when doing transit network analysis.
Transit networks can also be used for performing transit assignment. You can estimate the number of passengers that utilize links in a transit network as a function of transit level of service. These models produce link level and aggregate ridership statistics. TransCAD includes an array of sophisticated transit network assignment procedures.
TransCAD is the only GIS with specific extensions for public transit. TransCAD can perform data management for complex transit systems and has applications in customer information systems, scheduling, and marketing.
TransCAD includes a comprehensive library of logistics procedures that apply to all modes of transportation and can be used to solve a variety of logistics problems.
TransCAD provides a rich set of tools that solve various types of pickup and delivery routing problems. These tools are used to prepare input data, solve the routing problem, and provide tabular and graphical output of the resulting routes and vehicle schedules. The TransCAD procedures can solve many variations on the classic vehicle routing problem, including restrictions on the time when stops can be made, the dispatching of vehicles from multiple depots, and the use of non-homogeneous vehicle fleets. The vehicle routing procedure in TransCAD is also capable of solving problems involving mixed pickup and delivery. Once a solution is found and the results displayed graphically, users can edit the routes interactively by adding or removing stops. Once stops have been added or removed, users can perform a re-optimization of the route so as to minimize time window violations.
Arc routing problems are a class of problems that involve finding efficient ways to travel over a set of links in a transportation network. Arc routing has a large number of public and private sector applications, including street sweeping, solid waste collection, snow plowing, mail delivery, and other door-to-door operations. In a typical arc routing problem, people or vehicles are dispatched from one or more depots to traverse a set of service links. The result of an arc routing problem is a set of one or more routes that cover all the service links with the minimal amount of deadheading.
Network Flow and Distribution Analysis
TransCAD includes a set of procedures for solving network flow problems. These problems involve efficient delivery of goods or services, and arise in transportation and many other contexts.
TransCAD procedures for regional partitioning, clustering, and facility location have broad applications in transportation and marketing. Clustering routines assemble customers, facilities, or areas into groups that are compact and can be serviced efficiently. Districting models group Census tracts, ZIP Codes, counties, or other regions into territories that are compact and balanced. Location models evaluate the costs and benefits of any number of proposed facility locations.
TransCAD provides powerful automated procedures for defining territories:
Site Location Analysis
Site location problems involve choosing the best location for one or more facilities from a set of possible locations. TransCAD can address virtually all types of location problems. For example: