Recently, the development of non-pneumatic tires (NPT) such as the Michelin Tweel is receiving increased attention due to potential advantages over pneumatic tires such as low mass, no run flat, good contact pressure distribution, and low rolling resistance (RR). This study focuses on the design of a NPT based on properties of vertical stiffness, contact …
Tag Archive: Transportation
Mar
10
Predicting lane utilization and merge behavior at signalized intersections with auxiliary lanes: A Buffalo, New York, study
Auxiliary through lanes (ATLs) are often used to increase the capacity at signalized intersections. The effectiveness of these lanes is a direct function of the level of their utilization by motorists, which tends to be significantly lower than continuous through lanes. Currently, there is no official model that can be used to predict ATL utilization, …
Mar
10
Roundabout Slip Lanes: Performance and Safety Analysis
A slip lane, an optional separate exclusive) right-turn lane that lies adjacent to a roundabout, allows right-turning movements to bypass the roundabout itself. Research reveals a need to assess the value of slip lanes. Therefore, the goal of this research is to articulate a more thorough understanding of a single-lane roundabout with a slip lane, …
Mar
10
Pseudo-probabilistic user equilibrium assignment in travel corridor networks containing managed facilities
Throughout the years, transportation organizations and agencies have been unable to keep up with increasing demand for roadway facilities. Similarly, traditional public-sector funding such as motor fuel taxes is falling short in meeting the growing demand for new transportation infrastructure. With deficit financing and congestion problems common to many highways throughout the United States, DOTs …
Mar
02
Development and analysis of vehicle trajectories and speed profiles along horizontal curves
Vehicle crashes at horizontal curves account for 42 percent of lane departure crashes on roadways. The risks of crashes on horizontal curves have been reported to be about 1.4 to 5 times greater than that for tangent sections. Twenty-five percent of the total number of fatal crashes in the United States occurred on horizontal curves. …
Mar
02
Evaluation of an active wildlife-sensing driver warning system at Trapper’s Point, Wyoming: Phase I
Collisions with wildlife are a serious concern on American highways. In Wyoming, the concern has prompted the Wyoming Department of Transportation to construct an experimental wildlife detection and driver warning system at Trappers Point, north of the town of Pinedale on US Highway 191. The focus of this thesis is two-fold: to develop a framework …
Feb
25
Transfer coordination model and real-time strategy for inter-modal transit services
In multi-modal transit networks with several intersecting lines and modes, travel through the network typically requires one or more transfers among transit lines and modes, and as such transfer time is a significant component of transit travel time from the perspective of passengers. Accordingly, efficient transfers are very important to increase the attractiveness and productivity …
Feb
18
Analyzing Drivers’ Responses to Portable Changeable Message Signs in Rural Highway Work Zones
The number of work zones has been increasing in the highway system of the United States because of rising needs in highway construction and maintenance. Highway work zones disrupt normal traffic flow and create safety problems. To improve safety by reducing the risk of vehicle crashes, temporary traffic control devices have been developed and implemented …
Feb
18
Modeling highway traffic safety in Nigeria using Bayesian network
Highway traffic safety is an issue that confronts developing countries as well as those of industrialized nations. A lot of people are injured and/or killed all over the world each day on highway traffic related crashes. Nigeria, as a developing country, has been experiencing unusually high traffic related injury and fatality rates. In order to …
Feb
16
Minimizing congestion on railway networks
The railway transportation is becoming more and more important to the whole transportation system. The railway transportation is cost-effective, energy-efficient and safe. The railway is a major method of transportation of freight and passengers in many countries. Given the fact that the railway industry is facing rapid increasing demand, better planning and scheduling tools are …