Posted Wednesday, September 03, 2014
An accelerated growth in the volume of freight shipped on American highways has led to a significant increase in truck traffic, influencing traffic operations, safety, and the state of repair of highway infrastructure. Traffic congestion in turn has impeded the speed and reliability of freight movement on the highway system. As freight movement continues to grow within and between urban areas, appropriate planning and decision making processes are necessary to mitigate the above-mentioned impacts. However, a main challenge in establishing these processes is the lack of adequate data on freight movements such as detailed origin-destination (OD) data, truck travel times, freight tonnage distribution by OD pairs, transported commodity by OD pairs, and details about truck trip stops and paths. As traditional data sources on freight movement are either inadequate or no longer available, new sources of data must be investigated.
Posted Friday, March 14, 2014
Posted Thursday, December 19, 2013
In this research project a number of theoretical volume-delay functions have been proposed with some gaining wide practical applications. The major practical volume-delay functions (VDFs) include Bureau of Public Roads (PBR) function, the Davidson function, the Conical function, and the Akcelik function. The predictive accuracy of these models is heavily dependent on accurately specifying the free flow speed and practical capacity of the highway under study. In addition, properly calibrated parameters of these models are of paramount importance in ensuring realistic results.
Posted Thursday, December 19, 2013
This research investigated the issue of facilitating network information exchange among models and more specifically concentrated on two primary objectives: (a) identify solutions to the model information exchange problem, focusing on the network, and (b) assess the feasibility of the implementation of the proposed solution and provide recommendation for its practical implementation.
Posted Tuesday, May 28, 2013
The Managed-Lane Modeling Practice Workshop was created to establish managed-lane modeling procedures within the Florida standard travel demand model structure, FSUTMS, and to adopt a standard travel demand forecasting practice when evaluating managed lanes in Florida.
A blue-ribbon panel of experts lead the discussion toward developing a set of specific recommendations on best-practice modeling strategies for express lanes throughout the state. The recommendations address issues related to potential toll revenue, transportation demand, and congestion/system performance, with an in-depth examination of the analytical tools available for direct or adapted use.
Presenter Presentations
Posted Monday, August 27, 2012
This project provides recommendations for modeling transit trips within the FSUTMS framework. This work was undertaken with the purpose of designing and implementing, within FSUTMS and associated support systems, the changes necessary to improve the preparation of transit demand forecasts to a point consistent with federal expectations, and simultaneously to incorporate state of the practice techniques and tools.
Major New Model Features
Project Documents
Citilabs Technical Memos - Improvements in Cube 6.2
Models, Prototype & Software
Posted Thursday, September 29, 2011
Development of a Data Framework for the Florida Standard Urban Transportation Model Structure
Posted Wednesday, September 21, 2011
Posted Monday, April 25, 2011
As of October 2018, FDOT has approved Cube 6.4.4 (including Cube Base, Voyager, Analyst, Cluster, and Avenue) as the official version for developing FSUTMS models. Public agencies interested in obtaining the software should contact .(JavaScript must be enabled to view this email address). For additional information about the current software version and technical issues, please contact .(JavaScript must be enabled to view this email address).
The Florida regional and statewide travel models will be transitioning io new modeling platforms with the anticipated model conversion completion date of July 2023. The two software platforms available for this transition are PTV Visum and TransCAD.
Posted Friday, May 21, 2010
Special generators are introduced in the sequential four-step modeling procedure to represent certain types of facilities whose trip generation characteristics are not fully captured by the standard trip generation module. They are also used in the traffic impact analysis to represent new developments. The objectives of this research project are twofold: 1) to analyze qualitatively trip generation characteristics of special generators and provide recommendations on how to improve the modeling of special generators in the Florida Standard Urban Transportation Model Structure (FSUTMS); 2) to examine the advantages and disadvantages of two modeling approaches, i.e., the link distribution percentage method and the special generator method, for performing traffic impact analyses for proposed developments.
Posted Friday, May 21, 2010
Posted Monday, March 15, 2010
This update formally releases an updated version of the FSUTMS Transit Model Cube Voyager application for Tier A and Tier B/C cities that can be imported into a regular travel demand model. The details are as follows:
This update formally releases an updated version of the FSUTMS Transit Model Cube Voyager application for Tier A and Tier B/C cities that can be imported into a regular travel demand model. The details are as follows:
This update formally releases the newly developed FSUTMS Transit Model Application that can be imported to a regular travel demand model. The details are as follows:
Transit Model Application
This update replaces the FORTRAN programs used in the current transit modeling framework for REWALK (REWALK.exe) and TAReport (TAReport.exe) with Cube Voyager applications (ReWalkApp and TAReportApp, respectively). The Cube Voyager applications serve the same purpose as the FORTRAN programs. The accompanying documentation describes the application logic, catalog keys, input and output files, and procedures to import the applications into a model.
Transit Framework Frequently Asked Questions (FAQ)
Framework Documentation
There are two companion documents that summarize the new transit modeling system for FSUTMS-Voyager. The Theoretical Framework document describes the theoretical underpinnings and coordination between the modeling elements. It mentions some of the key features of PT and summarizes the rationale for some of the new procedures and practices. In contrast, the purpose of the Application Framework is to describe how the elements of the FSUTMS-Voyager Transit Model are applied in PT and FSUTMS-Voyager. It contains many of the details and specifics, including settings for many of the PT control statements and keywords.
Customized Programs and Documentation
While many of the traditional customized programs have been converted to FSUTMS-Voyager scripts, some programs were maintained and/or revised to address unique needs. A summary report has been created for each program. It describes the program's history and purpose, logic and input and output files. The format of the input and output files is also provided.
At this time, there are three customized programs:
- AUTOCON develops the drive-access connectors,
- REWALK coordinates the walk-access connectors generated by PT with the percent walk data produced by GIS procedures, and
- TAREPORT reads the PT-generated loaded link files and produces two transit assignment reports.
Suggested Default Parameters and Sample Scripts
The following files are provided to give users a starting point when developing their transit models in FSUTMS-Voyager. At this time, path-building scripts and the corresponding factor files are provided for Tier A, B and C areas. Please see the Application Framework for a description of the tiers.
Transit Modeling Training Material
Sample Model