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Synthesis of Intelligent Work Zone Practices
VARIABLE SPEED LIMITS Related Documents and Links

This page includes a listing of Variable Speed Limit (VSL) Applications in Work Zones related documents and links for the ENTERPRISE project "Synthesis of Intelligent Work Zones Practices". If you would like to contribute to the listing or have any questions, please contact roelofs@acconsultants.org.

State/Resource	Variable Speed Limit in Work Zones Realated Document/Link
Florida	Evaluating Variable Speed Limits and Dynamic Lane Merging Systems in Work Zones: A Simulation Study (2012) - Study simulating a two-to-one work zone lane closure configuration under different Maintenance of Traffic (MOT) plans and comparing work zone throughputs and travel times across MOTs including early and late Dynamic Lane Merge and VSL combinations. Implementing Variable Speed Limits in Florida - Study on plans for iFlorida that called for the implementation of variable speed limits.
Michigan	Field Test of Variable Speed Limits in Work Zones (2003) - Report objective was to design and deploy a viable VSL system in a work zone and evaluate the extent to which: speed limit compliance is affected, safety and traffic flow is improved.
Minnesota	Minnesota IWZ Toolbox (2008) - Minnesota strategies for using ITS in work zones and when to appropriately select IWZ systems. Field Evaluation of Variable Advisory Speed Limit System for Reducing Traffic Conflict at Work Zones (2006) - Evaluated effectiveness in reducing traffic conflicts and improving operational efficiency at a work zone on I-494.
Nebraska	Evaluation of Work Zone Speed Advisory System (WZSAS) (2001) - Evaluation study to assess the effectiveness of WZSAS in encouraging traffic diversion when there is congestion in the work zone and its applicability as a traffic management tool.
Smart Work Zone Deployment	Evaluation of Variable Speed Limits in Work Zones (2013) - Study and evaluation of VSL and Variable Advisory Speed Limits systems and makes recommendations based on the case studies investigated.
Street Smart Rental	VSL Deployment Criteria Considerations - Short webpage on deployment criteria and anticipated system effects of variable speed limits.
Texas	Summary of Treatments to Improve Work Zone Speed Limit Compliance (2005) - Project to determine effective measures to motivate and encourage drivers to observe posted speed limits in work zones.
USDOT	Work Zone Intelligent Transportation Systems Implementation Guide (2014) - Document to provide guidance on implementing ITS in work zones to assist public agencies, firms, developers, etc. Examples of Variable Speed Limit Applications (2000) - Transportation Research Board (TRB) Speed Management Workshop that discusses domestic and foreign examples of VSL applications. Guidelines on Managing Speeds in Work Zones - Summarizes available guidance on setting speed limits and managing speeds in work zones.
Utah	Evaluation of the Effectiveness of Variable Advisory Speed System on Queue Mitigation in Work Zones (2012) - Study objective was to perform a statistical analysis on performance data to evaluate VASS effectiveness on queue mitigation. VSL Signs Effects on Speed and Speed Variation in Work Zones (2008) - Research tested the compliance and derived potential advantages from the use of variable speed limit equipment.
Virginia	Work Zone Variable Speed Limit Systems: Effectiveness and System Design Issues (2010) - Study recommends that Virginia DOT pursue VSL technology but carefully scrutinize algorithm design and Variable Speed Limit sign placement, and a cost/benefit analysis indicates that VSLs may be most appropriate for long-term applications.

 

Deliverables

• 1-pager
• Related Documents/Links
  • Dynamic Merge
  • Queue Warning
  • Alternate Routes
  • Variable Speed Limits
  • Other IWZ Resources