Long-Term Trends and Critical Issues Impacting Regional Transportation...
AuthorsLes Jacobson, Senior ITS Manager, Parsons BrinckerhoffThomas Jacobs, Director, University of Maryland Center for Advanced Transportation Technology ProblemCurrently, transportation related...
View ArticleWarrants and Implementation Guidelines for TL-4 and TL-5 Median Barriers and...
I. RESEARCH PROBLEM STATEMENT Since the late 1970’s much progress has been achieved for the evaluation procedures of crash tested highway safety appurtenances. This is evidenced by the...
View ArticleNetwork Capacity Analysis Simulations and Tools
Title: Network Capacity Analysis Simulations and Tools Problem: Parametric modeling is a useful approach to formulate high level estimates often required for policy and decision making purposes....
View Article"Just in Time" Casual Ridesharing: Implications and Opportunities for...
PROBLEM STATEMENT: In the current climate of high energy prices and budget shortfalls, individuals, transit agencies, and all levels of government are seeking to extract the maximum mobility benefit...
View ArticleOccupant Safety in Passenger Vehicle Impacts with High-Containment Safety...
In the U.S., each year more than 160,000 people are involved in crashes of vehicles striking a median barrier or bridge rail. Despite the use of safety belts and other occupant restraint systems, such...
View ArticleAccess Management Implementation in Urban Centers
Access management strives to find a balance between the safe and efficient movement of traffic along roadways and providing access to adjacent development. Often, this is achieved by limiting the...
View ArticleStrategies to Reduce Agency Costs and Improve Benefits Related to Highway...
RESEARCH PROBLEM STATEMENT As indicated in the 2003 Transportation Research Board (TRB) Access Management Manual: “Roads are an important public resource. They are costly to build and to improve or...
View ArticleStrategies to Reduce Agency Costs and Liability Related to Highway Access...
Research has been done on the impacts of highway access management in a number of research projects such as NCHRP Report 420, Impacts of Access Management Techniques, and the current Federal Highway...
View ArticleCyber-physical Applications in Urban Freight Systems
Problem Cyber-physical systems (CPS) are embedded computer systems that integrate with physical processes. CPS clearly falls within the realm of Intelligent Transportation Systems in terms of...
View ArticleModeling Practice for Advanced Transit Systems
The modeling of a new transport system is always problematic, in that many of the built in assumptions related to existing modes are often violated. The recent surge in interest of vehicle automation...
View ArticleMeasuring the Impacts of Social Media: Developing Social Media Performance...
Social media’s rapid growth among public service organizations, for-profit corporations, and non-profit entities has been extensively monitored. Moreover, in the last several years, many aspects of...
View ArticleShort-Term Strategies to Manage Rail Transit and Regional Rail Passenger...
Scope: A successful rail transit or passenger rail system will eventually experience congestion, when demand for service exceeds the design capacity. Congestion impacts the flow of vehicles (line...
View ArticleMaturity Models for Runway Safety
Runway excursions and incursions are primary safety concerns for airports and aircraft operators. Maturity models are needed to understand runway excursions and incursions, and to subsequently reduce...
View ArticleCalibration of Highway Capacity Manual (2010) Bicycle Level of Service to...
Problem: The 2010 Highway Capacity Manual (HCM) includes methodologies for calculating Bicycle Level of Service (BLOS) as part of “Multimodal LOS” analysis. The methodology is intended to allow...
View ArticleBest Practices in Performance Measure Dashboard Design
Background Dashboards integrate business intelligence databases into purposefully simple, web-based reporting mechanisms, accessible to multiple decision makers. A dashboard brings an integrated view...
View ArticlePlanning, Marketing, and Service Delivery of Transit Services for Special Events
Background: Little is known on a consistent basis of how transit agencies plan for and implement services for special events. Some examples of these events are: festivals, fairs, major sporting...
View ArticleSocially Optimal Taxi Regulation
Taxis, for hire car services, group ride vans, jitney and black car services provide mobility services in most major cities and in many smaller towns and regional centers. In many cases they exist in...
View ArticleUnderstanding the Role of Taxis for Improved Urban Planning
Taxis, for hire car services, group ride vans, jitney and black car services exist in most major cities and in many smaller towns and regional centers. In addition, in many developing countries,...
View ArticleBus Speed Prediction Methodology
The Highway Capacity Manual (HCM) 2010 includes a procedure for predicting average bus speed. This speed is used, with other factors, to determine the transit Level of Service (LOS) for an urban...
View ArticleDetermining and Communicating Reliability of Crash Prediction Models
During initial implementation of the Highway Safety Manual (HSM) (1), the state of the art of safety analysis has progressed and more has been learned about the impact on accuracy of assumptions made...
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