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针对局部交通状况分析所需要的多粒度仿真功能，本文分析了从宏观规划模型到微观仿真模型转换时的逻辑保证和数据需求，设计了一种基于路径流的多粒度交通仿真方法，从物理、逻辑和运行三个层面实现了从基于点和线的宏观路网到基于车道的微观路网的转换.针对转换过程中交通小区质心及其路网连接线等虚拟实体的处理问题，本文进一步提出了新的支路近似方法.基于上述方法，开发了适用于TransCAD和VISSIM模型转换的软件包，方便地实现了从宏观路网中局部区域交通状况分析到微观路段交通流量仿真的一致性转换.

Path-Flow-Based Cross-Resolution Conversions for Simulation Model

Sub area traffic analysis is one of critically needed capabilities in practical traffic engineering applications. This paper aims to develop a fully automated network conversion and calibration tool to assist engineers easily extract a portion of a macroscopic planning network to construct a consistent sub area of interest, and then convert it into a detailed model suitable for microscopic simulation. A cross resolution simulation (CRS) method is adopted in this paper, which allows a rapid extraction of selected sub areas from a regional planning network with OD matrix, and a lane based expansion of the network topology, a consistent regeneration of subarea path flow and link volume. This paper integrates the above mentioned key modeling components into an open source package and conducts a case study to demonstrate its effectiveness.