TransCAD for Great Britain
TransCAD is the first and only Geographic Information System (GIS)
designed specifically for use by transportation professionals to store,
display, manage, and analyze transportation data. TransCAD combines GIS
and transportation modeling capabilities in a single integrated
platform, providing capabilities that are unmatched by any other
package. TransCAD can be used for all modes of transportation, at any
scale or level of detail. TransCAD provides:
- A powerful GIS engine with special extensions for transportation
- Mapping, visualization, and analysis tools designed for
- Application modules for routing, travel demand forecasting,
public transit, logistics, site location, and territory management
TransCAD has applications for all types of transportation data and
for all modes of transportation, and is ideal for building
transportation information and decision support systems. TransCAD runs
on readily-available hardware under Microsoft Windows 2000, XP, Vista,
and embraces virtually all desktop computing standards. This has two
- You can acquire and install TransCAD at a much lower cost than
any other integrated GIS and transportation modeling solution
- You don't have to build custom applications or complicated data
interchange modules to perform transportation analysis with GIS data
TransCAD extends the traditional GIS data model to include
transportation data objects such as:
- Transportation networks
- Routes and route systems
- Linear-referenced data
These extensions make TransCAD the best data management and analysis
tool for working with transportation data. You can use the GIS functions
to prepare, visualize, analyze, and present your work, and use the
application modules to solve routing, logistics, and other
transportation problems with greater ease and efficiency than with any
other product. Networks and matrices can be of virtually unlimitted
Transportation Networks are
specialized data structures that govern flow over a network. Networks
are stored in a highly-efficient way, enabling TransCAD to solve routing
problems very quickly. Networks can include detailed characteristics
- Turn delays or restrictions
- Overpasses, underpasses, and one-way links
- Intersection and junction attributes
- Intermodal or interline terminals, transfer points, and delay
- Zonal centroid connectors
- Link classifications and performance functions
- Transit access, egress, and walk transfer links
hold data such as distance, travel times, and origin-destination flows
that are essential for many transportation applications. TransCAD
provides functions for creating and manipulating matrices, and tools for
spatial analysis and advanced visualization of matrix data. This
combination lets you see and understand transportation flows and network
characteristics in new and different ways.
and Route Systems indicate paths taken by trucks, rail, cars,
buses, or individuals traveling from place to place. TransCAD includes
tools to create, display, edit, and manipulate routes, and unique
display technology for mapping routes in a clear and compelling fashion.
You can organize a set of related routes into a single route system
layer, and include route attributes, stop locations, and vehicle
Referencing identifies the location of transportation features
as a distance from a fixed point along a route. TransCAD can display and
analyze these data sets without conversion, and includes dynamic
segmentation functions to merge and analyze multiple linear-referenced
data sets. This makes TransCAD a natural choice for the following types
- Facility infrastructure and operations data
- Accident locations
- Pavement or rail condition ratings
- Traffic flows and transit ridership data
- Facility alignments
- Capital project data
Mapping and Data Visualization
With TransCAD, you can create
high-quality map output using dozens of thematic mapping styles and
options, unlimited colors, and fully-scalable line styles and TrueType
map symbols. With a few clicks of the mouse, MapWizard® automatic
mapping technology helps you create color and pattern coded maps,
dot-density maps, scaled-symbol maps, and maps with integrated pie
charts and bar charts. TransCAD also provides specialized mapping
functions for transportation applications:
- Automatic display of one-way streets
- Dynamic map labeling that adjusts to
the scale of the map
- Built-in highway shields that result
in maps of publication quality
- Route system maps that show
overlapping routes side-by-side for greater visibility
- Desire line maps that show
Additional tools let you visualize data
that cannot be displayed using a conventional GIS:
- Intersection diagrams that illustrate
flows and turning movements
- Strip charts that depict facility
characteristics and their variation along a route
- Interactive tools for editing
geographic features and for defining turn restrictions and delays
Tables: You can see the
data associated with map features in tabular form. See data for a single
feature, or display data for an entire layer in a dataview. You can use
dataviews to add and delete records, edit values, create formula fields,
or compute statistics.
Output: Page layout
tools help you design and create professional presentations that combine
the results of your analyses into a single powerful display. You can
print your maps and layouts on any printer or plotter, or save them to
vector or raster formats. You can also save your work as JPEG or PNG
files for use on a web page.
Geographic Analysis Tools
One of the best reasons to use a GIS is
to unearth and analyze the geographic components of your data. You can
create bands (buffers) around map features, create districts, define
areas of influence, and find shortest paths. TransCAD also makes it easy
to overlay and aggregate data and calculate statistics.
Ask and Answer Geographic
Questions: Where are areas with the highest population density?
How many people live within one, two, and three miles of a transit stop?
TransCAD answers these and many other types of questions. You can
integrate census statistics with your own data to identify geographic
characteristics that impact you and your operations. You will be amazed
at how quickly you can enhance your decision making using this
easy-to-use GIS tool.
You can automatically create bands around any number of map features and
then analyze the characteristics of those areas. Find out how many
customers live within a certain distance of a store, compute the
demographic characteristics around potential store sites, analyze the
neighborhoods most affected by noise pollution from a highway, or
determine accessibility to facilities.
Districts: TransCAD lets
you join smaller areas into districts and compute the attributes for
each one. For example, you can group ZIP Codes together to create sales
territories, land parcels to create zoning districts, or city blocks to
create school districts.
Areas of Influence: You
can determine the areas closest to each of your facilities by building
areas of influence, then estimate the attributes within each area to
determine areas that are under- or over-served.
Surface Analysis: With TransCAD, you can analyze and display surfaces
on a two-dimentional map or as a 3D map. You can create contour maps of
elevations and then determine the viewshed for any location, either at
ground level or at a particular height. For example, you can find areas
of weak service from a transmission tower. You can also create surfaces
that represent data values, such as measures of air pollution or levels
of radon gas, over a geographic region.
TransCAD is the only software package that fully integrates GIS with
demand modeling and logistics functionality. There are many reasons why
it is valuable to have a GIS as part of a planning or routing and
First, GIS makes it possible for models to be much more accurate.
Network distances and travel times are based on the actual shape of the
road network and a correct representation of highway interchanges. Also,
with networks you can specify complex road attributes such as truck
exclusions, delays at intersections, one-way streets, and construction
Second, the entire modeling process is more efficient. Data
preparation is greatly facilitated and the database and visualization
capabilities catch errors before they cause problems.
A third advantage is the GIS itself. In TransCAD, different modeling
equations can easily be derived and applied for different geographic
subareas. Similarly, TransCAD brings new and much-needed capabilities
for measuring geographic accessibility.
Lastly, the GIS approach provides a graphical solution that is easily
understood. Users can convey highly technical information to the
non-practitioner in a very straightforward and understandable manner.
TransCAD can solve problems of virtually any size. Unlike other GIS
software products, application modules in TransCAD are fully integrated with GIS
functions for improved performance and ease of use. This makes TransCAD
ideal for many types of transportation applications including:
- Network Analysis
- Transit Analysis
- Transportation Planning and Travel Demand Modeling
- Vehicle Routing and Logistics
- Territory Management and Site Location Modeling
Network analysis models are used to solve many types of transportation
- Shortest path routines
can be used to generate the shortest, fastest, or least-costly route
between any number of origins and any number of destinations, with any
number of intermediate points.
- Network partitioning
can be used to create service districts based on accessibility,
perform drive-time analysis, or evaluate possible facility locations.
When you perform network partitioning, you can also calculate the
network distance or travel time from specific locations.
- Traveling salesman models
construct efficient tours that visit any number of points on a
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.
Transportation Planning and Travel Demand Modeling
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.
Generation/Production models included with TransCAD estimate
the number of trips, by purpose, that are produced or originate in
each zone of a study area.
- Trip Attraction
models predict the number of trips attracted to each zone or to a
particular land use.
- Trip Balancing
methods are provided so that the number of attractions equals the
number of productions.
- Trip Distribution
models are used to predict the spatial pattern of trips or other flows
between origins and destinations.
- Mode Split models are
used to analyze and predict the choices that individuals or groups of
individuals make in selecting the transportation modes that are used
for particular types of trips.
- P-A to O-D and Time of Day
tools enable you to convert productions and attractions to origins and
destinations, decompose a 24-hour trip table matrix into hourly trip
tables, convert person trips to vehicle trips, and apply peak hour
Assignment models estimate the flow of traffic on a network
and allow you to establish the traffic flow patterns and analyze
congestion points. TransCAD provides a full complement of traffic
assignment procedures that are used for modeling urban traffic. These
procedures include numerous variants that are tailored for modeling
transit, as well as intercity passenger and freight traffic.
- Advanced Highway Assignment
procedures included with TransCAD allow for generalized-cost traffic
assignment, HOV assignment, multimode vehicle assignment, multiple
user class traffic assignment, combined trip distribution/assignment,
and assignment with volume-dependent turning delays and signal
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.
Vehicle Routing and Logistics
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.
Territory Management and Site Location Modeling
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.
Map Your Own Data
TransCAD lets you create maps using your own data. Map data from dBASE
files and text files directly, or access data from any ODBC compliant
data source such as Access, Oracle, SQL Server, and many others. You can
also use raster images such as satellite or aerial photographs directly
in your maps. These images can be used as a means of reference or in
conjunction with the map editing tools to create or edit geographic
You can map ArcView Shapefiles, MapInfo
TAB files, and Oracle Spatial tables directly. With the built-in
translators, you can also import geographic data from other desktop
mapping, GIS, and CAD packages, as well as many common file formats.
Geocoding: You can link
your data to map features or locate data on a map using street address
or ZIP Code, or by simply pointing to the correct location. In a few
easy steps, you can use your own data to color code ZIP Codes by sales
or display the locations of customers.
GPS: A built-in
interface to Global Positioning System (GPS) devices lets you track and
record your location, and build geographic databases as you work. With a
GPS and a laptop, users in the field can create accurate geographic
files of public utilities, corporate facilities, geographic features,
TransCAD will perform well on any computer that runs Windows 2000,
XP, Vista, or 7. Recommended hardware includes at least 256MB of RAM, at
least 1GB of hard disk space, and a CD-ROM or DVD drive.
TransCAD comes in two versions. Standard TransCAD contains all of the
GIS, planning, network analysis, routing and logistics, and location
modeling capabilities described in this brochure. Base TransCAD has most
of the GIS capabilities but does not include all of the procedures for
transportation planning and routing, nor the planning utilities which
permit importing CTPP, PUMS, TranPlan, MINUTP, emme/2, TRIPS, and TP+
SUPPORTED DATA STRUCTURES:
Points, Lines, and Areas
Matrices & Desire Lines
Shortest Path with Turn or Transfer Penalties
Address to Address Shortest Path
Multiple Shortest Path
Travel Demand Forecasting
Routing and Arc/Street Routing
CTPP, PUMS Import
TranPlan, MINUTP, emme/2, TRIPS, TP+ Import
Geographic Analysis Tools
Surface Analysis Tools
Linear Referencing & Strip Charts
Basic Geographic Editing