We study hypotheses testing in the presence of a possibly singular covariance matrix. We propose an alternative way to handle possible non-regularity in a covariance matrix of a Wald test, using the identity matrix as the weighting matrix when calculating the quadratic form. The resulting test...

This report presents a user's manual and a programmer's guide for the computer program MEDUSA. The program is capable of simulating the impacts of several vehicles. It assumes that the collision are elastic, and is consequently applicable for low relative velocity impacts. A theoretical...

The City of Los Angeles and Caltrans would like a simulation testbed for testing alternate traffic management strategies in the Santa Monica corridor. This study assesses the data available for such a simulation and describes data needs, potential sources, and data preparation required. It...

Verslo galimybių analizė – labai svarbus įrankis sėkmingam verslui vykdyti, deja, tokiai analizei atlikti, reikia žinių ir įgūdžių, kurių pradedantys verslininkai neturi. Žinių spragą iš dalies galima užpildyti pasinaudojant rinkoje esančiomis verslo analizės priemonėmis,...

This documentation and software provides a tool which enable a user to perform the following tasks regarding vehicle spacing:; calculate the minimum initial spacing between two vehicles, calculate the possibility and severity of collision between two vehicles, visualize the motion of the two...

This paper discusses the effects of collisions in vehicle-following operations, especially for short-spacing scenarios. The collision analysis is conducted with a two-dimensional simulation program by which the translational and rotational movements of vehicles can be fully represented. Also...

This research project investigates the behaviors of vehicles in collisions, especially when they are closely spaced. The study uses a two- dimensional simulation program, EDSMAC, which allows longitudinal and lateral movements as well as the yaw motion of vehicles. The simulation model...

Mobile radio communications systems are attracting more and more attention since they provide a means for users on the move to exchange information with other stationary or mobile stations. The capability of communication on the move can support many services and create lots of applications. For...