基于开放交通模型的分布式宏观交通仿真
Distributed macroscopic traffic simulation with Open Traffic Models
摘要：
本文介绍了OTM-MPI，开放交通模型平台（OTM）的扩展运行宏观交通模拟在高性能计算环境。宏观模拟适合于研究区域交通情况时，总趋势的兴趣，而不是个别车辆的痕迹。它们也适用于研究各类车辆的路由行为，例如应用程序通知的车辆。用METIS进行网络划分。进程间的通信通过MPI（消息传递接口）完成。结果提供了两个网络：一个现实的网络，这是从开放的街道地图查塔努加，TN，另一个更大的合成网格网络。该软件记录了查塔努加使用256个核心的加速比为198，合成网络使用1，024个核心的加速比为475。
英文摘要：
This paper presents OTM-MPI, an extension of the Open Traffic Models platform (OTM) for running macroscopic traffic simulations in high-performance computing environments. Macroscopic simulations are appropriate for studying regional traffic scenarios when aggregate trends are of interest, rather than individual vehicle traces. They are also appropriate for studying the routing behavior of classes of vehicles, such as app-informed vehicles. The network partitioning was performed with METIS. Inter-process communication was done with MPI (message-passing interface). Results are provided for two networks: one realistic network which was obtained from Open Street Maps for Chattanooga, TN, and another larger synthetic grid network. The software recorded a speed-up ratio of 198 using 256 cores for Chattanooga, and 475 with 1,024 cores for the synthetic network.
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