Parameter Sharing Reinforcement Learning for Modeling Multi-Agent Driving Behavior in Roundabout Scenarios

Fabian Konstantinidis, Ulrich Hofmann, Moritz Sackmann, Jorn Thielecke, Oliver De Candido, Wolfgang Utschick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

Modeling other drivers' behavior in highly interactive traffic situations, such as roundabouts, is a challenging task. We address this task using a Multi-Agent Reinforcement Learning (MARL) approach that learns a driving policy based on a minimal set of assumptions: drivers want to move forward and avoid collisions while maintaining low accelerations. Each agent's actions depend only on his observation of the local environment; no explicit communication between agents is possible. In order to teach the agents to safely interact with each other, and for example, respect right-of-way rules, we use parameter sharing: During training all vehicles are controlled by the same policy and the aggregated experiences are used to improve the policy. Moreover, parameter sharing enables us to use the efficient Soft Actor Critic (SAC) algorithm for training. The approach is evaluated in a roundabout setting with different traffic densities. Furthermore, the ability of the model to generalize is assessed in an untrained roundabout. In both settings, success rates above 97 % demonstrate that a safe and transferable policy is learned.

Original languageEnglish
Title of host publication2021 IEEE International Intelligent Transportation Systems Conference, ITSC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1974-1981
Number of pages8
ISBN (Electronic)9781728191423
DOIs
StatePublished - 19 Sep 2021
Event2021 IEEE International Intelligent Transportation Systems Conference, ITSC 2021 - Indianapolis, United States
Duration: 19 Sep 202122 Sep 2021

Publication series

NameIEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC
Volume2021-September

Conference

Conference2021 IEEE International Intelligent Transportation Systems Conference, ITSC 2021
Country/TerritoryUnited States
CityIndianapolis
Period19/09/2122/09/21

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