Powerful scripting for unlimited model structures

TP+ (Transportation Planning Plus) is a transportation planning package that provides a high level of functionality and flexibility. It makes use of the latest computing technology available to offer the widest range of features.

TP+ provides a general framework for implementing a wide variety of travel demand forecasting processes encompassing simple 4-step models to the most advanced travel models requiring thousands of zones and the most advanced features. The advantages of this framework are increased flexibility and the ability to formulate a wider variety of model structures.

TP+ uses compiler technology to dynamically process a comprehensive scripting language. This allows both repetitive execution of one or more modeling steps until certain conditions are met and conditional flow control over the processing sequence.

Network Calculator
TP+ can simultaneously process and merge up to 10 networks. The input network files can be of various formats: ASCII records, dBase format (DBF), or any TP+, TRIPS, MINUTP, or TRANPLAN binary network format. Each record is processed through user-controlled logic, and its data can be summarized and reported in various ways.

Highway Assignment
TP+ builds zone-to-zone paths (and associated zonal matrices) and assigns trips to highway network links. A highway network, zonal matrices, zonal data, and turn penalties can be input, and a loaded network, new matrices, turning volumes and reports can be output.
TP+ assigns trips using capacity-restrained, link-based equilibrium assignment techniques applied iteratively or incrementally. Different criteria can be used to determine when sufficient iterations have been performed to reach a desired state.
Various options are available to provide the user with additional outputs including select link analysis.


Matrix Calculator

TP+ processes zonal data and matrices according to user specified expressions. Zonal data and matrices can be input, and matrices and reports can be output. Various file formats for both input and output are supported. There are no default processes. The powerful scripting language allows for the application of all types of commonly used demand processes (multinomial and hierarchical choice models, cross-classification and regression models, gravity models, matrix frataring).

Public Transit Analysis

TP+ estimates zone-to-zone public transit paths, extracts level-of-service data along these paths and assigns trips.

A public transit network is coded using the highway network as the base-supporting infrastructure allowing for interaction between operating speeds and roadway travel conditions. Public transit services not running on streets are represented using separate rights-of-way.