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National Center for Transit Research » Publications

Impact of Transportation Demand Management (TDM) Elements on Managed Lanes Toll Prices

(Center Identification Number: 77960-00) This research involved a simulation comparing three days of actual traffic data for the I-95 Express Lanes and General Purpose Lanes in Miami, Florida to a hypothetical scenario where all transportation demand management (TDM) activities and toll exemptions were eliminated. The purpose of the research was to quantify the extent to which carpooling, vanpooling, and transit usage contribute to better traffic flow in the I-95 corridor. The express lane analysis revealed a slight degradation in level of service (LOS) and a moderate increase in tolls in the southbound direction (+$0.41). It revealed a slight improvement in LOS and a slight decrease in tolls in the northbound direction (-$0.19). A phenomenon that occurred was that a large number of inherently low emission vehicles (ILEVs), which are toll exempt, … Read entire article »

Filed under: Featured, Final Report Abstracts, FY 2015 Final Reports, Projects, Publications

Journal of Public Transportation on USF ScholarCommons

The National Center for Transit Research (NCTR) is pleased to announce the availability of our Journal of Public Transportation on the University of South Florida’s Scholar Commons website at http://scholarcommons.usf.edu/jpt/. The Journal of Public Transportation is now part of Scholar Commons, a service of the University of South Florida Tampa Library, that is a virtual showcase for USF’s research and creative energies. We hope you will find our new site to be easier to use from finding archived articles to signing up for email notices to to submitting article. … Read entire article »

Filed under: Journal of Public Transportation, Publications

Evaluation of Automated Vehicle Technology for Transit

(Center Identification Number: 77975-00) The purpose of this report is to provide an overview of the state of automated vehicle (AV) technology in transit. The Florida Department of Transportation (FDOT) wishes to know what AV technology is currently available that could be used in transit with an eye towards possible demonstration projects. It finds that the operational use of AV technology by transit in the U.S. has been limited to a few prototypes. With one exception, there are no immediate plans by bus manufacturers to add AV technology to their vehicles. The exception was Volvo/Nova Bus. They are considering adding a bicycle/pedestrian warning system to their buses. It appears that for the moment any new demonstrations of AV technology in transit would involve significant engineering work and retrofitting of buses. Download the … Read entire article »

Filed under: Featured, Final Report Abstracts, FY 2015 Final Reports, Projects, Publications

Estimating Costs and Benefits of Emissions Reduction Strategies for Transit by Extending the TRIMMS Model

(Center Identification Number: 77932) This study details the development of a series of improvements to the Trip Reduction Impacts of Mobility Management Strategies (TRIMMS™) model. TRIMMS now estimates a wider range of emission pollutants and incorporates a new module that evaluates the impact of land use strategies on transit patronage. TRIMMS uses the emission inventory of the Environmental Protection Agency Motor Vehicle Emission Simulator (MOVES2010a), which makes it suitable to run official State implementation air quality plan (SIP) and regional emissions analyses for transportation conformity purposes. This model enables the Florida Department of Transportation (FDOT), transit agencies, Metropolitan Planning Organizations (MPO) and local communities to conduct cost‐benefit assessments for most of the strategies identified in the FDOT‐sponsored Transit Ozone‐Reduction Strategies Toolbox, without the cost and expertise required by more sophisticated models. Download … Read entire article »

Filed under: Featured, Final Report Abstracts, FY 2011 Final Reports, FY 2012 Final Reports, Projects, Publications

Evaluation of Camera-Based Systems to Reduce Transit Bus Side Collisions-Phase II

(Center Identification Number: 77940) The sideview camera system has been shown to eliminate blind zones by providing a view to the driver in real time. In order to provide the best integration of these systems, an integrated camera-mirror system (hybrid system) was developed and tested. Traditional aftermarket systems utilize wide-angle cameras, which provide up to 100-degree horizontal field of view. The developed camera system had 65-degree horizontal view, which was adequate to cover the side blind zones. The initial system was tested in a controlled driving test with 29 drivers. The drivers used the system to drive the bus and identify objects placed around the bus. Comparison was performed with the mirrors only vs. the hybrid system. Statistical analysis showed that with the camera system, drivers had a 96-98 percent correct … Read entire article »

Filed under: Featured, Final Report Abstracts, FY 2011 Final Reports, FY 2012 Final Reports, Projects, Publications