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Posted Saturday, July 02, 2005

Comparing Short-Term Traffic Projections with Traffic Counts—The JUATS 2015 Model

Travel demand models are for the purpose of estimating future travel demand given changes in transportation infrastructure and socioeconomics/demographics. Given that the methodologies in a travel demand model are a controlled factor, the effect of input data on the accuracy of the traffic volumes projected for a short term horizon has not yet been thoroughly investigated.

Posted Wednesday, June 01, 2005

Facility Performance Model Enhancements for Multimodal Systems Planning, Part 2

There were two main research components to this project. The first component addressed the issue of performance measures and level of service assessment for rural freeways. The second component addressed the issue of freeway capacity values and the impacts of ramp merge and diverge influence areas.

Posted Wednesday, March 02, 2005

Calibration of Highway/Transit Speed Relationships for Improved Transit Network Modeling in FSUTMS

Current FSUTMS model uses a set of highway-transit speed curves based on facility type and area type to model the relationship between highway speed and transit speed. The drawbacks of this method include that there is considerable vagueness in the definition of area types and that transit boarding and alighting activities not considered in estimating transit travel time.

Posted Wednesday, June 02, 2004

Alternatives for Estimating Seasonal Factors on Rural and Urban Roads in Florida

In the current practice at the Florida Department of Transportation (FDOT), seasonal factors (SFs) are used in the calculation of annual average daily traffic (AADT) at portable traffic monitoring sites (PTMS). The permanent traffic monitoring sites (TTMSs) are first manually classified into different groups (known as seasonal categories) based on similarities in traffic characteristics of roads and on engineering judgment.

Posted Tuesday, June 01, 2004

Future Directions for Multimodal Areawide Level of Service Handbook Research and Development

In 1999, Florida Statutes were amended to allow local governments to establish multimodal transportation districts (MMTDs) to promote development that favors pedestrian, bicycle, and transit modes over the automobile mode, to develop professionally accepted techniques for measuring Level of Service (LOS) for automobiles, bicycles, pedestrians, transit, and trucks, and to assist local governments in implementing multimodal LOS analysis.

Posted Saturday, February 14, 2004

Applied Policy Research: Facilitated Consultation Process for MPO

The Florida Department of Transportation (FDOT) faced numerous challenges in coordinating designation of new metropolitan planning organizations (MPOs) after the most recent decennial census.

Posted Wednesday, October 01, 2003

Updates and Enhancements to the LOSPlan User Interface and Computational Procedures

This report summarizes the results of several tasks performed to improve and enhance the Florida Department of Transportation's (FDOT) LOSPLAN suite of software programs. Initial development of the LOSPLAN programs was conducted under a previous contract (BC-354-38).

Posted Wednesday, October 01, 2003

Improving Operation of FDOT Telemetered Traffic Monitoring Sites

The Florida Department of Transportation (FDOT) currently monitors about 7,000 traffic count sites, including over 300 permanent Telemetered Traffic Monitoring Sites (TTMSs). The monitoring equipment generally consists of traffic-actuated sensing devices imbedded in the pavement. These devices capture traffic volumes, vehicle classifications, and truck weights. The data gathered is thereafter downloaded and processed for Annual Average Daily Traffic (ADT), K-factor, T-factor, truck weight, and other pertinent information.

Posted Tuesday, September 02, 2003

Incorporating Feedback Loop into FSUTMS for Model Consistency

This project aims to address the well-known problem of inconsistent travel impedances that exists within FSUTMS' four-step traditional demand model by designing and implementing an automated feedback loop in FSUTMS. The direct method and Method of Successive Averages (MSA) method are used for implementing feedback.

Posted Tuesday, September 02, 2003

Incorporating Variable Peak-to-Daily Ratios into FSUTMS to Reduce Assignment Errors

The standard highway assignment model in the Florida Standard Urban Transportation Model Structure (FSUTMS) is based on the equilibrium trip assignment method. The method involves running several iterations of all-or-nothing capacity-restraint assignment with an adjustment for travel time to reflect delays encountered in the associated iteration.

Posted Saturday, August 02, 2003

Modeling the Interactions between Land Use and Transportation Investments Using Spatiotemporal Analy

While it is generally agreed that transportation and land use interact with each other, the feedback mechanism in their relationship has not been well defined at a level of detail that adequately supports travel demand modeling. Most studies to date have been at metropolitan level, thus unable to account for interactions spatially and temporally at smaller geographic scales.

Posted Wednesday, July 02, 2003

Trends and Conditions Research: Travel Demand, Transportation System, Impact of Transportation

The Florida Statutes (F.S.) mandate that state agencies conduct Trends and Conditions analysis in their annual Long Range Program Plan (LRPP). "By analyzing the trends and conditions, goals and objectives, and current facilities inventory, each agency and the judicial branch shall determine its unmet and forecasted future needs." (216.0158(1), F.S.).

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Research Reports / Statewide and Regional Models

Statewide and Regional Models