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Identification of Work Zone Crash Characteristics
https://intrans.iastate.edu/app/uploads/2018/08/Dissanayake_WZCrashChar.pdf

Work zone crashes within the work zone area – Iowa. Work zone crashes based on type of work zone is shown in Figure 3.13. Results showed that most crashes occurred on lane closure type of work zones when compared to shoulder work zones and lane shift work zones. Other types…

Work Zone Data Management Applications and Opportunities
https://intrans.iastate.edu/app/uploads/2021/03/wz_data_mgmt_apps_and_opps_w_cvr.pdf

…Use Cases ……………………………………………………………3 LITERATURE REVIEW ………………………………………………………………………………………………….7 Work Zone Data Stakeholders and Use Cases ……………………………………………………………7 Limitations of Existing Data ………………………………………………………………………………….10 Work Zone Elements of Intelligent Transportation System Data Interchange Standards …………………………………………………………………………………………………………….11 Agency Work Zone Data Management Practices ……………………………………………………..21 AGENCY SURVEY AND INTERVIEWS ………………………………………………………………………..22 Work Zone Data Use Cases …………………………………………………………………………………..23 Work Zone

Analytical Methods for Work Zone Travel Time Reliability
https://intrans.iastate.edu/app/uploads/2018/08/analytical_methods_for_work_zone_travel_times_w_cvr.pdf

…main objective of this study is to provide a framework for developing analytical methods for estimating work zone travel time reliability, considering various factors such as traffic volume, work zone configuration, and work zone intensity. The framework covers aspects of work zone selection for the model, evaluating each work zone

Determining the Effectiveness of Graphic-aided Dynamic Message Signs in Work Zones
https://intrans.iastate.edu/app/uploads/2018/08/BaiGraphicAidedDMSFinal-Report.pdf

…from previous research. The review covered several subjects relevant to work zone safety including the characteristics of work zone crashes, work zone traffic control methods, CMS applications in work zones, graphic-aided CMS studies in work zone safety, human factors in work zone safety, and the statistical methods used in these…

Evaluation of Work Zone Speed Limits: An Object and Subjective Analysis of Work Zones in Missouri
https://intrans.iastate.edu/app/uploads/2018/08/MO_WZSpeedLimit_FinalReport_Feb2011.pdf

…the increase in speed variance in the work zone was only 34%. Finally, for work zones with speed limit reductions of 15 mph or more, the increases in the work zone speed variance above the speed variance upstream of work zones ranged from 81% to 93%. Evaluation of Work Zone

Extension of Safety Assessment Tool for Construction Work Zone Phasing Plans
https://intrans.iastate.edu/app/uploads/2018/12/extended_safety_assess_tool_for_WZ_phasing_w_cvr.pdf

…two-lane work zone required variables ……………………………………………………..38 Figure 7.7. Urban multi-lane highway work zone required variables …………………………………….39 Figure 7.8. Arterial work zone required variables ……………………………………………………………….39 Figure 7.9. Ramp work zone required variables ………………………………………………………………….40 Figure 7.10. Work zones on signalized intersection (4-leg) required variables ……………………….40 Figure 7.11. Work zones on unsignalized intersection…

Best Practices for Managing Work Zone Data
https://intrans.iastate.edu/app/uploads/2018/08/work_zone_data_best_practices_w_cvr.pdf

Zone Data Collection 3.1 Work Zone Data Sources 3.2 Data Elements 3.2.1 Work Zone Location 3.2.2 Work Zone Time 3.2.3 Work Zone Lane Configuration 3.2.4 Work Zone Traffic Control 3.2.5 Other Data Elements 3.3 Work Zone Data Archiving 3.3.1 Database Type 3.3.2 Data Update Frequency 3.3.3 Data Mapping and Visualization…

Developing a Research-Grade Iowa Work Zone Database
https://intrans.iastate.edu/app/uploads/2020/12/research-grade_wz_db_dev_w_cvr.pdf

…Group URL uniform resource locator WisDOT Wisconsin DOT WZAD Work Zone Activity Data WZDB work zone database WZED Work Zone Event Data WZDI Work Zone Data Initiative WZDS work zone data system WZDx Work Zone Data Exchange XML extensible markup language ix EXECUTIVE SUMMARY Problem Statement Accurate work zone data…

Development of a Traffic Diversion Estimation Model for Freeway Construction Work Zones
https://intrans.iastate.edu/app/uploads/2018/08/Liu-WZDiversionFinalReport.pdf

…B WORK ZONE MAPS 63 B.1 Portage Work Zone Work Zone 64 B.2 Portage Work Zone Location Work Zone 65 B.3 Tomah Work Zone West Work Zone East Work Zone 66 B.4 Tomah Work Zone Location (West Work Zone) Work Zone 67 B.5 Tomah Work Zone Location (East Work Zone)…

Evaluation of Work Zone Safety Using the SHRP2 Naturalistic Driving Study Data – Volume 1 Toolbox of Work Zone Countermeasures
https://intrans.iastate.edu/app/uploads/2021/11/SHRP2_NDS_data_WZ_safety_eval__Vol_1_toolbox_Nov_7_2021.docx

…Recommendations for Work Zone Configuration 44 CHAPTER 12: Work Zone Barriers 45 12.1 Summary 45 12.2 Background 45 12.3 Summary of Other Relevant Studies for Work Zone Barriers 45 12.4 Summary of Relevant SHRP2 Work Zone IAP Project Findings for Work Zone Barriers 46 12.5 Recommendations for Work Zone Barriers…

Calibration of Highway Safety Manual Work Zone Crash Modification Factors
https://intrans.iastate.edu/app/uploads/2018/08/2014_HSM_work-zone_CMFs_w_cvr.pdf

…of effort required for performing work zone safety studies, because different data sources need to be cleaned and then fused together. Three types of data are required: work zone characteristics such as length, duration, location, and type; work zone traffic characteristics; and work zone crash characteristics. Thus the work zone

Guidance on Use of Channelization for Two-Lane Two-Way Work Zone Configurations
https://intrans.iastate.edu/app/uploads/2021/06/gdlns_on_use_of_temp_wz_barriers_w_cvr.pdf

Work Zone Interventions: A Driving Simulator Study. Public Policy Center, University of Iowa, Iowa City, IA. https://apps.itd.idaho.gov/apps/manuals/WorkZoneSafety/files/WorkZoneSafetyPrintable.pdf https://apps.itd.idaho.gov/apps/manuals/WorkZoneSafety/files/WorkZoneSafetyPrintable.pdf https://www.in.gov/indot/files/Safety_WorkZoneSafetyandMobilityPolicy.pdf https://www.michigan.gov/mdot/0,4616,7-151-9625_54944—,00.html https://www.roads.maryland.gov/OOTS/WorkZoneTemporaryTrafficBarrierPolicies.pdf https://www.nh.gov/dot/org/projectdevelopment/highwaydesign/documents/FINAL_positive_protection_workzone_guidance_02221.pdf https://www.nh.gov/dot/org/projectdevelopment/highwaydesign/documents/FINAL_positive_protection_workzone_guidance_02221.pdf https://www.cdc.gov/niosh/topics/highwayworkzones/default.html https://www.workzonesafety.org/crash-information/workzone-fatal-crashes-fatalities/#national https://www.workzonesafety.org/crash-information/workzone-fatal-crashes-fatalities/#national https://www.dot.ny.gov/divisions/engineering/design/dqab/hdm/hdm-repository/chapt_16.pdf https://www.dot.ny.gov/divisions/engineering/design/dqab/hdm/hdm-repository/chapt_16.pdf https://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/traffic/TEM/Pages/default.aspx https://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/traffic/TEM/Pages/default.aspx 46 Schrock, S. D., E. J. Fitzsimmons, M-H. Wang, and Y. Bai. 2013. Proposed Positive Protection Guidance for Kansas: Synthesis…

Freeway Work Zone Lane Capacity
https://intrans.iastate.edu/app/uploads/2018/08/2009-drakopoulos-lane-capacity.pdf

…per hour per lane vpdpl: vehicles per day per lane W-E: West-to-East W-N: West-to-North Work Zone: “A work zone is an area of a trafficway with highway construction, maintenance, or utility-work activities. A work zone is typically marked by signs, channeling devices, barriers, pavement markings, and/or work vehicles. It extends…

Highway Work Zone Capacity Estimation Using Field Data from Kansas
https://intrans.iastate.edu/app/uploads/2018/08/work-zone_capacity_estimation_w_cvr.pdf

Highway Work Zone Capacity Estimation Using Field Data from Kansas Final Report February 2015 Sponsored by Smart Work Zone Deployment Initiative Federal Highway Administration (TPF-5(081)) About SWZDI Iowa, Kansas, Missouri, and Nebraska created the Midwest States Smart Work Zone Deployment Initiative (SWZDI) in 1999 and Wisconsin joined in 2001. Through…

Smart Work Zone Activity App (SWiZAPP)
https://intrans.iastate.edu/app/uploads/2019/06/smart_work_zone_activity_app_w_cvr.pdf

…real-time workzone-related activities. The SWiZAPP Projects screen displays all work zones managed by the user. From this screen, users can add new work zones, update existing work zones with new information, and perform geolocation. This view also hosts a search engine for filtering work zones based on the state (such…

Development of Adjustment Factors for HCM Sixth Edition Freeway Work Zone Capacity Methodology
https://intrans.iastate.edu/app/uploads/2020/07/adjustment_factors_for_HCM_freeway_wz_capacity_w_cvr.pdf

…estimate freeway work zone capacity. The data used to develop the HCM work zone capacity methodology were collected from 12 work zone sites with different configurations across 6 states including Arizona, Arkansas, California, Maryland, Nevada, and Virginia. It was expected that capacity at work zones in the Smart Work Zone

Evaluation of Temporary Ramp Metering for Work Zones
https://intrans.iastate.edu/app/uploads/2018/08/Ramp-_Metering_for_Work_Zones.pdf

zones differed in terms of work zone configuration, location of work zone with respect to the ramp, ramp volume, entrance ramp grade and length, and truck percentage. Table 2.1 shows the characteristics of each work zone. Work Zone 5 had the highest ramp volume as well as an 8% truck…

Understanding the Impacts of Work Zone Activities on Traffic Flow Characteristics
https://intrans.iastate.edu/app/uploads/2018/08/work_zone_activity_traffic_flow_impacts_w_cvr.pdf

…or work zone lane closure downstream. For freeway work zones, a table extrapolating the 2010 HCM values to freeway work zones with five moving lanes was developed as shown in Table 2.4. 16 Table 2.4. Work zone capacity and minimum free-flow speed adjustment factors for freeway work zones Work Zone

Evaluation of Variable Speed Limits in Work Zones
https://intrans.iastate.edu/app/uploads/2018/08/variable_advisory_speeds_w_cvr.pdf

…VSL in work zones. As reported in the previous section, three other states, Michigan, Utah, and Minnesota also deployed VSL in work zones. A summary of the responses of states using VSL in work zones is provided. 4 Table 1. State DOTs using VSL in work zones State Use VSL…

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