Connected and Automated Vehicles

This report presents a study of the effectiveness of the transit telephone information system on trip behavior at Metropolitan Transit Authority ( MTA), from both the user's and the operator's perspective. The objectives of the experiment were: 1) to assess the perception of dynamic transit information service, 2) to identify the media which can most effectively disseminate transit information, and 3) to compare the information service by human operators with the service by an automated system. The study looks at both the supply and the demand side of the provision of telephone information...

In this paper, the authors present several throttle and brake control systems for automatic vehicle following. These control systems are designed and tested using a validated nonlinear vehicle model first and then actual vehicles. Each vehicle to be controlled is assumed to be equipped with sensors that, in addition to its own vehicle characteristics, provide measurements of the relative distance and relative speed between itself and the vehicle in front. Vehicle-to- vehicle communication required for the stability of the dynamics of a platoon of vehicles with desired constant intervehicle...

Cooperative Adaptive Cruise Control (CACC) provides an intermediate step toward a longer-term vision of trucks operating in closely-coupled automated platoons. There are important distinctions between CACC and automated truck platooning. First, with CACC, only truck speed control will be automated, using vehicle to vehicle (V2V) communication to supplement forward sensors. The drivers will still be responsible for actively steering the vehicle, lane keeping, and monitoring roadway and traffic conditions. Second, while truck platooning systems have relied on a Constant Distance Gap (CDG)...

The purpose of this study is to provide a logical framework for the identification and evaluation of alternative Intelligent Vehicle Highway Systems (IVHS) functions, to sort by importance, and to specifically relate the various IVHS functions with the public sector goals they might serve. Toward this goal, an analytical sensitivity study was performed to estimate the benefits of those functions associated with modifying the speed-density-flow curves through the application of vehicle automation. Some analysis was also carried out to assess intersection throughput when signalization is...