The authors propose a real-time adaptive signal control model that aims to maintain the adaptive functionality of actuated controllers while improving the performance of traffic-actuated control systems. In this model, a flow-prediction algorithm is formulated to estimate the future vehicle arrival flow for each signal phase at the target intersection on the basis of the available signal-timing...

Intersections are considered as the most critical parts of the bus rapid transit (BRT) system. Transit signal priority is one of the efficient solutions to reduce BRT fleet delays at intersections. The aim of this study is to propose a new algorithm to decrease the BRT fleet delays at actuated intersections, while reducing the negative impacts on different approaches. The adaptive strategy is a...

Traffic intersections throughout the United States combine fixed, semi-actuated, and fully actuated intersections. In case of semi-actuated intersections, uncertainties are considered in phase duration. These due to car waiting queues pedestrian crossing. Intelligent transportation systems deployed traffic infrastructure can communicate Signal Phase Timing messages (SPaT) vehicles approaching c...

This paper addresses urban traffic control using an optimization model for signalized areas. The paper modifies and extends a discrete time model for urban traffic networks proposed in the related literature to take into account some real aspects of traffic. The model is embedded in a real time controller that solves an optimization problem from the knowledge of some measurable inputs. Hence, t...

The Problem Urban areas face increasingly acute vehicular traffic congestion. Current methods for measuring traffic flow on a real-time basis are antiquated and limited in their capacity to assess traffic dynamics. Buried inductive loop detectors at intersections are extensively used in the USA and Europe to measure traffic speed, occupancy and volume on freeways and arterials. The data obtaine...

In an electro-mechanical valve actuated engine, solenoid actuators drive the valves that control airflow into the cylinders, allowing elimination of the camshaft and flexible control of the valve timing. Individual control of the valves provides flexibility in valve timing over all engine operating conditions and fully enables the benefits of variable valve timing. This paper describes a closed...

The Signal Phase and Timing (SPaT) message is an important input for research applications of Connected Vehicles (CVs). However, the actuated signal controllers are not able to directly give SPaT information since influenced by both control logic real-time traffic demand. This study elaborates estimation method which proposed according idea that controller would provide similar timing states. T...

Transit usage is based on reliable and timely service. Priority is one method for maintaining reduced transit travel times and a reliable schedule, which make transit more attractive. However, with most buses operating within the same traffic lanes as other vehicle traffic, priority policy affects the surrounding traffic. Consequently, priority is often limited to minimal green time extensions ...

A novel mechanism concept for a fully flexible, motordriven, cam-actuated engine valve was reported in [1]. It is capable of i) variable valve timing, ii) variable lift and iii) individual valve phasing control. To check the validity of the concept in real engine environment, engine tests were performed using a single-cylinder of a modified sixcylinder 3.8-liter production engine, with the new ...