Data-Driven Work Zone Process Reviews Case Study: Iowa Department of Transportation
Author/Presenter: Sankar, Param; Boyapati, Ram; Pate, AlanAbstract:
Federal regulations in 23 CFR part 630 subpart J require State highway agencies to conduct a Work Zone Process Review (WZPR) every 2 years to evaluate work zone processes and procedures, as well as identify systematic improvements to current and future projects. The Federal Highway Administration now encourages agencies to use a data-driven approach to make WZPRs more outcome- and performance-driven, while bringing about more of a continuum mindset to WZPRs, as opposed to isolated point-in-time reviews. This type of approach incorporates analysis and use of quantitative data including exposure, safety, mobility, and inspection data, as well as analysis and use of qualitative information for inclusion in WZPRs. This case study is one of a series of resources on data-driven WZPRs. It was developed in collaboration with the Iowa Department of Transportation and focuses on three major performance areas: safety, mobility, and field reviews. Anonymized data from crash reports, traffic sensors, probe vehicles, work zone field reviews, and work zone project tracking were used to conduct the analyses, derive metrics and trends, and identify key issues. The case study used data from 2018 through 2020. This case study demonstrates how Iowa DOT successfully uses crash, traffic, field review, and construction data to streamline its WZPRs and provide a repeatable quantitative basis for more systematic reviews that extend across multiple process review cycles.
Publication Date: September 2021
Full Text URL: Link to URL
Publication Types: Books, Reports, Papers, and Research Articles
Topics: Crash Data; Crash Rates; Data Analysis; Law Enforcement; Mobility; Performance Measurement; Work Zone Safety; Work Zones