Safety Effects of Transit Signal Priority: Magnitude and Mechanism

Transit signal priority (TSP) has been implemented for transit systems in many cities of the United States. In evaluating TSP systems, more attention has been given to its operational effects than to its safety effects. Existing studies assessing TSP’s safety effects reported mixed results, indicating that the safety effects of TSP vary in different contexts. Prior studies in the United States evaluating TSP implementations in two metropolitan areas reported reductions in overall crashes on TSP corridors after TSP activation. However, the most recent study results indicate that there is potential increase in pedestrian and bike-involved crashes associated with TSP implementations.

Transit in Flex: Examining Service Fragmentation of New App‐Based, On‐Demand Transit Services

The transportation industry may be on the verge of its largest technological revolution in a century, with new forms of on-demand transportation capitalizing on innovations like the GPS chips in smart phones to develop app-based, on-demand transportation, connecting user and driver, known alternatively as ridesourcing, ride-hailing, Transportation Network Companies (TNCs). As TNCs like Lyft, Uber, Didi and many others spring up, along with a number of other app-based, on-demand models like ridesplitting, microtransit and E-Hail, among others, a growing number of cities are considering whether they could shed the high cost and unprofitability of running fixed route transit services through conversion to app-based, on demand systems.

Social Media Analysis for Transit Assessment

The impact of personal opinions, attitudes, and belief is significant in decision-making processes for public transportation services. Therefore, stakeholders and transportation planners have been trying to collect various information on public transit service and performance to assess quality and management strategies. In this regime, social network service (SNS) can be considered as a large but unorganized database of information where individuals exchange event base attitude and sentiment (i.e., experience from individual transportation activity).

Autonomous Vehicles and Their Potential to Shift Transit Ridership in Urban Areas

Autonomous vehicles present a unique opportunity to increase safety, roadway capacity, and even extend services to people with disabilities. At the same time, their potential impact with respect to decreasing transit ridership of established systems has not yet been well studied, along with the corresponding sustainability implications. Increased transit ridership decreases the number of vehicles on roadways and decreases the environmental impact of passenger transportation. However, It is often less convenient compared to a personal automobile with respect to convenience.

A Way Forward: Designing a Flexible Transportation Network that Advances Opportunities and Connectivity for Arlington and Grand Prairie, Texas

The cities of Arlington and Grand Prairie, Texas, are among the most rapidly-growing suburban communities in the country, with growing populations of commuters, university students, older adults, and others with a wide range of transportation needs and expectations. In spite of this rapid and diverse growth, the two cities lack any form of structured, fixed-route transit. Arlington has been the subject of particular national interest, often touted as “America’s largest city with no fixed-route transit” and is thus ripe for deeper study.

Trip and Parking Generation at Transit-Oriented Developments: Two Case Studies in Texas

The decision on how best to allocate land around transit stations is a debated topic, with transit officials often opting for park-and-ride lots over active uses such as multifamily housing, office, and retail organized into transit-oriented developments (TODs). Providing large park-and-ride lots has been the default strategy to maximize transit ridership in the short-run. But is it the best strategy in the long run? The debate continues when the land is developed, with officials usually assuming that TODs require the same number of parking spaces as conventional development and that transit stations require the same number of park-and-ride spaces as non-TOD stations, even if much of the travel demand is captured internally and much of the transit demand is generated by TODs themselves.

Assessment of Extreme Weather Events Under Changing Climate on Transit Desert Communities

Extreme weather events like Hurricane Katrina or Hurricane Harvey had severe impacts on local communities and their transportation infrastructure. In many cases evacuation out of flooded areas was difficult because of a lack of adequate transportation infrastructure. In this study, a vulnerability assessment will be made by combining storm surge and extreme rainfall projections with the Transit Deserts method that assesses geographic vulnerability, in regards to access to employment and other services that impact quality of life, and transit equity and access.

Integrating Transportation Management Companies (TMCs) and Public Transportation

The rise of Transportation Management Companies (TMCs) like Uber and Lyft has disrupted and transformed the field of urban transportation. With near-ubiquitous access to a largely safe, comfortable, and reliable mode of transport, commuters and travelers are altering their transportation habits in unprecedented ways. As TMCs continue to grow in significance, the role of public transportation will unavoidably change in response.

Assisting New Transit Riders, Including those with Disabilities, via an App Designed for All

Planning and riding public transportation can be particularly daunting for new transit riders, especially those with intellectual disabilities. Transit agencies are also challenged with balancing the demand for paratransit services and its rising costs. Additionally, paratransit can be limiting to riders – advance registration of 24 hours or more is often required to book trips and there are often long waiting times. Riders receiving travel training to use fixed-route transit gain the freedom to travel more frequently, attend job interviews and work, and become more involved in the community.