Evaluation of a Multi-Vehicle Merging Strategy Under Different Lateral Maneuvers in the Presence of Sudden Braking

Transportation System ◽

Lateral Acceleration ◽

Switching Function ◽

Trajectory Function ◽

Multiple Vehicles ◽

Simulation Results ◽

Trajectory Generator ◽

Merging Strategy

The ability for multiple vehicles to merge into an ongoing platoon is an important task in the field of intelligent transportation system (ITS). For such task, first a strategy is required to include a set of rules and actions which allows the incoming vehicles to join the platoon, and second; a safe lateral trajectory generator which always ensures the safety of lateral maneuver in terms of lateral acceleration. In this paper we evaluated the multi-vehicle merging strategy using different lateral trajectory functions under sudden breaking. Simulation results show that for merging task, a switching function is necessary to switch from an adaptive lateral function to a constant lateral trajectory function in case of sudden decelerations.

Simulation of Efficient Vehicle Dispatching and Routing for the Application in Intelligent Transportation System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.598.709 ◽

2014 ◽

Vol 598 ◽

pp. 709-713

Author(s):

Yen Wen Chen ◽

Chang Wu Chen ◽

Xin Chang Chen ◽

Addison Y.S. Su

Keyword(s):

Travel Time ◽

Transportation Cost ◽

Specific Area ◽

Transportation System ◽

Vehicle Dispatching ◽

Simulation Results ◽

Safety Considerations

This paper provides the simulation for a designed vehicle dispatching and routing system for safe and efficient vehicle transportation. The objective of the simulation is to verify the performance of the cooperative dispatching and routing decisions for vehicles within a specific area consisting of streets and several intersections. In addition to computing a specific routing path for the arrival vehicle based on its destination and safety considerations, the proposed scheme provides a detour mechanism under the transportation cost constraint. This paper also points out the existence of hidden conflicting path problems in the dispatching approach and proposes a backtracking approach to solve this problem at the route decision phase so that the travel time can be guaranteed. The simulation results show that the proposed scheme can effectively assign the vehicles with proper routes and without any collisions with good performance.

Study on the integration effect of multiple vehicles’ delayed velocities on traffic stability in intelligent transportation system environment

Engineering Computations ◽

10.1108/ec-05-2020-0261 ◽

2020 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Geng Zhang ◽

Qinglu Ma ◽

Dongbo Pan ◽

Yu Zhang ◽

Qiaoli Huang ◽

...

Keyword(s):

Traffic Flow ◽

Research Result ◽

Transportation System ◽

Content Type ◽

Car Following ◽

Car Following Model ◽

Multiple Vehicles ◽

Integration Effect

Purpose In an intelligent transportation system (for short, ITS) environment, a vehicle’s motion is affected by the information in a large scale. The purpose of this paper is to study the integration effect of multiple vehicles’ delayed velocities on traffic flow. Design/methodology/approach This paper constructed a new car-following model to study the integration effect of multiple vehicles’ delayed velocities on traffic flow. The new model is analyzed by linear and nonlinear perturbation method theoretically and also verified by simulation. Findings It is found out that the integration of preceding vehicles’ delayed velocities affect the stability of traffic flow importantly, and three preceding vehicles’ delayed velocities information should be considered in real traffic. Originality/value The new car-following model by considering the integration effect of multiple vehicles’ delayed velocities is firstly proposed in this paper. The research result shows that three preceding vehicles’ delayed velocities information is the best choice to stabilizing traffic flow.

5G Coupler Design for Intelligent Transportation System (ITS) Application

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v7i2.pp899-904 ◽

2017 ◽

Vol 7 (2) ◽

pp. 899

Author(s):

Dyg Norkhairunnisa Abang Zaidel ◽

Norhudah Seman ◽

Mohd Ridhuan Mohd Sharip ◽

Dyg Azra Awang Mat ◽

Nur Alia Athirah Mohtadzar

Keyword(s):

Coupling Coefficient ◽

Analytical Study ◽

Impedance Matching ◽

Transportation System ◽

Tight Coupling ◽

Fifth Generation ◽

5G Technologies ◽

Simulation Results

Aiming to achieve 3-dB coupling, operating in fifth generation (5G) technologies, this paper introduces a new design of tight coupling coupler that will be operated in 5G technologies. Two stubs and two slots have been implemented into the 3-dB coupler design in order to achieve impedance matching between the ports and to give better coupling performances, respectively. Moreover, a study on the stubs’ and slots’ effects towards the S31 of the 3-dB coupler has also been presented in this paper. The proposed coupler is designed on Rogers RO4003C substrate. The simulation results and the analytical study on the stubs and slots implementation show that both stubs and slots affect the performance of the coupling coefficient.