This study aimed to investigate the relative performance of two models (negative binomial (NB) model and two-component finite mixture of negative binomial models (FMNB-2)) in terms of developing crash modification factors (CMFs). Crash data on rural multilane divided highways in California and Texas were modeled with the two models, and crash modification functions (CMFunctions) were derived. T...

Dynamic traffic assignment through analytical modeling and optimization has been widely accepted by the IVHS R&D community as a promising traffic control tool for understanding and relieving traffic congestion on conventional highways and city streets. Due to the completely controlled nature of AHS traffic, dynamic assignment of AHS traffic is even more promising. One added dimension of complex...

We describe an optical flow based obstacle detection system for use in detecting vehicles approaching the blind spot of a car on highways and city streets. The system runs at near frame rate (8-15 frames/second) on PC hardware. We will discuss the prediction of a camera image given an implicit optical flow field and comparison with the actual camera image. The advantage to this approach is that...

8.1 Discussion The automated highway system envisioned by researchers and institutions around the world suggests a complex structure that requires extensive research efforts. Among many issues, the realization of AHS depends mainly upon the realization of intelligent vehicle control methods. No matter what design approach is taken for vehicle control, there are two important issues that will ‘h...

Modeling and Simulation of the Automated Highway System by Farokh Hassanzadeh Eskafi Doctor of Philosophy in Engineering Electrical Engineering and Computer Sciences University of California at Berkeley Professor Pravin Varaiya, Chair We present the hierarchical structure for the control design of the Automated Highway System (AHS). This control hierarchy has four layers: network, link, coordin...

A comparison is drawn between the casualty rates per failure on an automated highway system (AHS) according to the longitudinal control configuration used. It is suggested that the most important failure of this system is one in which brakes fail full on. The inverse failure brakes will not apply—must be avoided by system designers. Incident for incident, it is clearly the more dangerous of the...

Fully Automated Chemiluminometric Assay for Hyperglycosylated Human Chorionic Gonadotropin (Invasive Trophoblast Antigen), Raj Pandian, Julie Lu, and Jolanta Ossolinska-Plewnia ( Quest Diagnostics, Nichols Institute, 33608, Ortega Highway, San Juan Capistrano, CA 92690; 2 Nichols Institute Diagnostics, San Clemente, CA 92673; * author for correspondence: fax 949-728-4990, e-mail pandianr@questd...