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Objective
Objective
CTRE provides an independent evaluation of work zone performance through data analytics, near-real time operational awareness, and annual reporting.
CTRE provides an independent evaluation of work zone performance through data analytics, near-real time operational awareness, and annual reporting.
The Iowa DOTs Traffic Critical Program is focused on work zone performance through a data driven approach to monitor, communicate, and continuously improve the mobility and safety of motorists during the construction season. Projects identified as Traffic Critical require enhanced traffic impact mitigation strategies, such as: Intelligent Work Zones (IWZ), limited construction hours (including night work), innovative contracting mechanisms, and Traffic Incident Management (TIM) plans to mitigate traffic impacts. The program has grown from 14 IWZ systems in 2014 to 34 in 2016.
On behalf of the Iowa DOT, the work zone mobility and safety data are continuously updated by the Center for Transportation Research and Education (CTRE) at Iowa State University via the REACTOR Lab. CTRE also provides assistance throughout the season by monitoring alerting systems as well as developing the work zone slow down/text alerting system. A summary poster showing recent activities can be viewed here.
Current Work Activities
Current Work Activities
On-going:
On-going:
- Calculations for 2017 Annual Performance Report
- Monitoring 2017 work zone performance
- Summarizing performance of work zone slowdown/text alerting system
Next Steps:
Next Steps:
- 2017 Annual Performance Report
Completed Work
Completed Work
- Current TCP Website - The performance monitoring tools developed aim to give Iowa DOT the capability to view the impacts of work zone projects on traffic as well as traffic sensor operating status. Connecting to the data collected by cameras, sensors, and dynamic message signs, the web-based performance monitoring tool is updated every night to add the information of the previous day into the view. Meanwhile, all the historical data is retained from the database so that the information from any time interval can be queried at any point. (https://reactor.ctre.iastate.edu/index.php/iwz/overview/)
- Work Zone Alert Feed API - The work zone alert feed was developed during the 2017 construction season. Using machine learning an algorithm was developed which identifies both slow and stop conditions across the state. A feed was developed to summarize this information for each work zone and is used in the TMC Operations Dashboard as well as for Text Alerting to DOT staff. The work zone alert feed API is available at the following link: http://reactorfeeds.org/feeds/alertfeed (additional documentation at http://reactorfeed.org)
Previous annual reports, presentations, and documentation is available at the following links:
- Presentation: "Data Driven Work Zone Performance Monitoring System" November 2017 Iowa DOT Traffic and Safety Forum
- 2015 TCP Annual Evaluation: https://iastate.box.com/s/osv5skrwud3tseuzb2pph5hjk5fyjtdy
- 2016 TCP Annual Evaluation: https://iastate.box.com/s/jibbzgp3owfkjbgbjbwllsm6z1depeuy
- 2016 TCP Annual Executive Summary: https://iastate.box.com/s/g9uimgqay328mpprqbkruqgbrg9qmxp2
- Performance Measure Description (2015): https://iastate.box.com/s/60pxatsd6k0q2ktkynhknb60u3xrpykj
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