深度強化學習於適應性號誌控制之研究

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姓名

王亦凡(I-Fan Wang) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

深度強化學習於適應性號誌控制之研究
(Research on Deep Reinforcement Learning for Adaptive Traffic Signal Control)

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摘要(中)

本研究旨在探討深度強化學習在適應性號誌控制中的應用，將透過微觀交通模擬軟體Vissim來模擬尖峰時段臺北市路口的車流情境，在考量不同車種當量影響和機車兩段式左轉設計下，建構基於深度強化學習演算法的適應性號誌控制系統，以改善目前市區路口尖峰時段的交通狀態。
架構上將透過深度強化學習網路Rainbow DQN作為號誌控制系統的判斷模型，考量流向基礎之車流狀態和時相狀態，動作選擇以時制順序切換與延長綠燈時間作為號誌控制方式，獎勵目標以最小化路口總壓力，並將結果與定時號誌為基準比較兩者間的路口績效表現。
實驗設計將晨峰和昏峰拆分成各三個不同時段場景訓練，結果顯示透過深度強化學習於適應性號誌控制確實能降低路口之停等長度，在各實驗場景皆可快速收斂於100回合內，並於晨峰尖峰時段改善50%的績效，且模型設計能適應研究設計中市區內不同尖峰時段的車流量，彈性的狀態、動作和獎勵設計能將模型一般化應用於其他場景應用。

摘要(英)

This study aims to explore the application of deep reinforcement learning in adaptive traffic signal control. Using the microscopic traffic simulation software Vissim, we simulate the traffic conditions at intersections in Taipei City during peak hours. Considering the effects of different vehicle types and the two-stage left-turn design for motorcycles, we construct an adaptive traffic signal control system based on a deep reinforcement learning algorithm to improve the current traffic conditions at urban intersections during peak hours.
The framework employs the deep reinforcement learning network Rainbow DQN as the decision model for the signal control system. The model considers traffic flow conditions and phase states, with action choices focusing on phase sequence switching and green light extension as control methods. The reward objective is to minimize the total intersection pressure. The system′s performance is compared with fixed-time signals as a baseline.
The experimental design splits morning and evening peaks into three different time periods for training. Results show that deep reinforcement learning in adaptive traffic signal control effectively reduces waiting times at intersections. The model converges quickly within 100 episodes across all experimental scenarios and improves performance by 50% during peak morning hours. Furthermore, the model design can adapt to varying traffic volumes during different peak periods in urban areas, with flexible state, action, and reward designs enabling generalization to other scenarios.

關鍵字(中)

★ 適應性號誌控制
★ 深度強化學習
★ Rainbow DQN
★ 交通模擬

關鍵字(英)

★ adaptive signal control
★ deep reinforcement learning
★ Rainbow DQN
★ traffic simulation

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 vii
第一章緒論 1
第二章文獻回顧 4
2.1強化學習於號誌控制的應用 4
2.2類神經網路架構設計 5
2.3強化學習機制 5
第三章研究方法 8
3.1深度強化學習算法 8
3.2價值基礎之Rainbow DQN 8
3.2.1 Double DQN 9
3.2.2 Prioritized Experience Replay 10
3.2.3 Dueling Network 11
3.2.4 Distributional DQN 12
3.2.5 Noisy Net 13
3.2.6 n步學習 14
第四章模型與實驗設計 16
4.1強化學習之模型設計 16
4.1.1代理人設計 16
4.1.2類神經網路架構 19
4.1.3訓練流程 24
4.2研究範圍 27
4.2.1使用資料 28
4.2.2模擬軟體 29
4.3實驗設計 29
4.4號誌控制於模擬場景 30
第五章實驗訓練結果 31
5.1訓練績效 31
5.1.1等候長度和停等延滯 31
5.1.2車輛數分析 33
5.1.3損失分析 35
5.2車種當量設定比較 36
第六章結論與建議 37
6.1結論 37
6.2建議 38
第七章參考文獻 39
附錄 43

參考文獻

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指導教授

陳惠國(Huey-Kuo Chen)

審核日期

2024-8-15

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