论文标题
分布式宏观交通模拟与开放流量模型
Distributed macroscopic traffic simulation with Open Traffic Models
论文作者
论文摘要
本文介绍了OTM-MPI，这是用于在高性能计算环境中运行宏观流量模拟的开放流量模型平台（OTM）的扩展。宏观模拟适用于研究区域交通情况时，当总体趋势是感兴趣而不是单个车辆痕迹时。它们也适合研究车辆类别的路由行为，例如应用程序的车辆。通过METIS进行网络分区。使用MPI（消息通信接口）完成了过程间通信。提供了两个网络的结果：一个现实的网络，该网络是从田纳西州查塔努加（Chattanooga）的开放式街道地图中获得的，以及另一个较大的合成网络网络。该软件使用256个核心为查塔努加（Chattanooga）记录了198个加速比例，而合成网络的475核心的比率为475。
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.
