Using Dual-Phase Message Signs to Display Airline Information Status: CompleteReport Date: 03/05/2010 Summary: Researchers used a driving simulator to compare the use of overhead dual-phase to multiple static Changeable Message Signs for effectiveness in conveying airline information to highway drivers approaching the Minneapolis-St. Paul International Airport. Researchers found that the two methods were equally effective. Final Deliverables: Report #2010-02 Technical Summary Related Materials: Related Research: