Results 71 to 80 of about 335 (178)

Intersection decision making for autonomous vehicles based on improved PPO algorithm

IET Intelligent Transport Systems, Volume 18, Issue S1, Page 2921-2938, December 2024.
In this article, we improve the proximal policy optimisation (PPO) algorithm in deep reinforcement learning and propose an MSA‐PPO algorithm, which adopts the self‐attention mechanism for input data processing, effectively identifies and focuses on the most important information in the interaction between vehicles to improve the overall performance of ...
Dong Guo, Shoulin He, Shouwen Ji
wiley   +1 more source

Evaluation of automated driving safety in urban mixed traffic environments

IET Intelligent Transport Systems, Volume 18, Issue S1, Page 2963-2976, December 2024.
The research process consisted of four steps. Step 1: The driving behaviour of an MV following an AV was analysed via DS. Step 2: The driving behaviour of the MVs in each section was implemented by adjusting the parameters of the IDM, a microscopic vehicle following the model.
Sangjae Lee, Young Jo, Aram Jung, Juneyoung Park, Cheol Oh   +4 more
wiley   +1 more source

Review, Testing and Validation of Capacity and Delay Models at Unsignalized Intersections

Promet (Zagreb), 2007
This paper deals with problems related to the capacity anddelay models at unsignalized intersections. The parameters ofvarious models are calibrated based on the on-site data obtainedin the countries where the models were developed.
Dražen Cvitanić, Deana Breški, Boris Vidak   +2 more
doaj   +1 more source

new methodological framework for within-day dynamic estimation of pollutant emissions in a large congested urban network

European Journal of Transport and Infrastructure Research, 2014
This paper presents a new methodological framework to address the problem of estimating pollutant emissions for large congested urban networks in a within-day dynamic context.
Stefano Gori, Simone La Spada, Livia Mannini, Marialisa Nigro   +3 more
doaj   +1 more source

Examining traffic crash injury severity at unsignalized intersections

Journal of Safety Research, 2010
This study presents multiple approaches to the analysis of crash injury severity at three- and four-legged unsignalized intersections in the state of Florida from 2003 until 2006. An extensive data collection process was conducted for this study.The dataset used in the analysis included 2,043 unsignalized intersections in six counties in the state of ...
Department of Civil, Environmental, Construction Engineering, University of Central Florida, Orlando, FL 32816-2450, United States ( host institution ), Haleem, Kirolos ( author ), Abdel-Aty, Mohamed ( author )   +3 more
openaire   +3 more sources

Optimization of delay at intersection in anticipate stuck on the traffic by using software SIDRA intersection 8.0 (Case study : BPKP’s intersection at Banda Aceh)

Journal of Civil Engineering
BPKP’s Intersection at Banda Aceh is one of the signalized intersections with four approaches. So there are 16 crossings, 8 diverging, and 8 merging, between vehicles such as delay and congestion.
Rezqi Malia, Raina P. Dinda, Alvisyahri Alvisyahri, Chaira Chaira   +3 more
doaj   +1 more source

Critical Gaps at Unsignalized Intersections with Bending Right-of-Way

Communications, 2018
The capacity calculation procedure for unsignalized intersections is based on the gap-acceptance theory in most of existing capacity regulations and it relies on one of the important parameters - critical gap.
Andrea Kocianova, Eva Pitlova
doaj   +1 more source

A cooperative control method for connected and automated vehicles at unsignalized intersection based on Monte-Carlo tree search

Journal of Traffic and Transportation Engineering (English ed. Online)
Enhancing the efficiency of traditional traffic light-based intersection control in intricate and dynamic traffic scenarios proves challenging due to vehicular queuing and frequent starts and stops. Addressing this challenge, a cooperative control method
Keke Yang, Zhigang Xu, Runmin Wang, Tao Lu   +3 more
doaj   +1 more source

Advanced Decision Making and Motion Planning Framework for Autonomous Navigation in Unsignalized Intersections

IEEE Access
Autonomous vehicle navigation relies heavily on integrating sensor data, perception, path planning, localization, and vehicle control. However, existing research often treats these components in isolation, particularly at unsignalized intersections ...
Gunasekaran Raja, Kathiroli Raja, Madhan Raj Kanagarathinam, Jeyadev Needhidevan, Priyadarshni Vasudevan   +4 more
doaj   +1 more source

Distributed Cooperative Driving Strategy for Connected Automated Vehicles at Unsignalized Intersections Based on Monte Carlo Method

Journal of Advanced Transportation
One of the most important goals of cooperative driving is to control connected automated vehicles (CAVs) passing through conflict areas safely and efficiently without traffic signals.
Haoming Li, Wei Dong, Linjun Lu, Ying Wang, Xianing Wang   +4 more
doaj   +1 more source