United States Department of Transportation
[PDF-465.43 KB]
Details:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
DOI:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final Report
-
Contracting Officer:
-
Corporate Publisher:
-
Abstract:Historically, evaluations of community traffic safety programs have collected data using nonprobability intercept surveys rather than more rigorous probability surveys, or they used secondary data instead of primary data collection of any kind. The technique used to select a sample of respondents from the broader population can affect the interpretability of the results of an evaluation. For example, compared to rigorous probability sampling, nonprobability sampling methods make it more difficult to generalize findings to the broader population. However, it is not always feasible to use probability sampling when collecting data based on operational complexity, statistical complexity, cost, and timing constraints. This document may serve as a tool to build on basic statistics knowledge of community traffic safety program evaluators by highlighting sound practices for using nonprobability sampling methods and secondary data sources. This document presents two nonprobability sampling methodologies (opt-in online panel surveys with quota sampling and intercept surveys with quota sampling) with practical steps for increasing the rigor of community traffic safety program evaluations. This document also identifies and describes existing data sources that may be of use to local traffic safety officials looking to evaluate their road safety programs as well as limitations of these data sources and suggestions regarding their use.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
Related Documents
-
[PDF - 685.87 KB]
