13.3.1 Overview

Several types of data are necessary to develop a microsimulation model. Necessary data varies on the project scope, complexity, and MOEs. The quality of data collected directly impacts the quality of the analysis, so it is crucial the data collected is reliable. As noted in Chapter 2
of this manual, it is crucial that all data be collected within the same time frame to confirm accuracy and reliability. For guidance on the types of data, their collection methods, and resources, please see Section 2.2
.

Chapter 2 of the FHWA Traffic Analysis Toolbox, Volume III: Guidelines for Applying Traffic Microsimulation Modeling Software 2019
(FHWA 2019 Guidelines) also discusses key steps in the data collection and analysis. The steps it outlines are as follows:

Identify data sources;

Assemble contemporaneous data;

Verify data quality; and

Identify travel conditions using cluster analysis

These steps are recommended to be followed for all projects that use FHWA approval and can be used for any project. For detailed guidance, refer to Chapter 2 in the Traffic Analysis Toolbox, Volume III.

13.3 Data Collection