A gyroscope-free inertial navigation system uses only accelerometers to compute navigation trajectories. It is a low-cost navigation system, but its output error diverges at a rate that is an order faster than that of a conventional gyroscope-based system. So integration with an external...

Keywords longitudinal control, car platooning, back-stepping control, multi-surface dynamic sliding mode control, integral filters, realtime control code This report presents the development of nonlinear longitudinal controllers and their realtime implementation for Automated Highway Systems...

This report examines platoon behavior during non-nominal operations, most especially due to emergency braking. Three main topics are discussed: multiple-collision wave propagation effects for homogeneous platoons with and without lead vehicle information, intra-platoon collision behavior of...

This document is a reference manual for the fsp and xfsp programs. The fsp program is a software tool used to interrogate the data that was collected during the Freeway Service Patrol Evaluation Project. The purpose of the program is to perform diagnostics on the data, generate error reports,...

This paper focuses on identifying roadway locations that display high collision rates only under wet pavement condition A unique approach of screening and identifying such locations, called the continuous risk profile (CRP) method, was utilized for this analysis The CRP method was applied to...

This report describes the research work that was conducted under PATH Task Order 5215 and its extension Task Order 6215, “Methods for Identifying High-Concentration Collision Locations (HCCL).†The subject matter is related to regularly published Caltrans reports, so-called Table C,...

This research addressed the first year of a proposed multi-year research effort that would investigate, assess, and develop neural network models from the field of artificial intelligence for automated detection of non- recurring congestion in integrated freeway and signalized surface street...

This paper considers the issue of safety in Automated Vehicle Highway Systems (AVHS). An approach is proposed for proving that a system is safe. The design for a proposed AVHS is considered and shown that if the physical controllers in the vehicles satisfy a set of constraints then the AVHS is...

This paper describes the experimental analysis techniques and modelling efforts applied to sequential pre-trip route choice behavior data under the influence of an Advanced Traveler Information System (ATIS). This effort is the first step in a process to develop a basic understanding of the...

This report documents findings from a series of studies investigating how Intelligent Transportation Systems (ITS) could be used to improve the integration of commercial vehicle operations (CVO) with governmental services and regulations within intermodal transportation management centers. After...