Author
Datta, Tapa; Catherine Hartner; and Lia Grillo
Benefit Summary HTML

This study evaluated the effectiveness of a dynamic late lane merge system (DLLMS) installed at work zones on I-94 during the 2006 construction season in southern Michigan. The system used microwave traffic sensors, wireless communications, and a series of portable dynamic message signs (DMS) to direct drivers when to merge. When congestion was detected in the open lane (lane without the tapered closure) and average traffic speeds dropped below a preset threshold level of 35 mi/hr, dynamic message signs upstream were activated to advise drivers to “Use Both Lanes to the Merge Point” to preempt queuing and improve traffic flow.

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Lesson Background HTML

This study tested the use of a dynamic lane merge system (DLMS) installed at three work zones on I-94 and I-64 in Michigan during the 2006 construction season. The system used microwave traffic sensors, wireless communications, and a series of portable dynamic message signs (DMS) to advise drivers of definite merge points when average traffic speeds dropped below pre-set threshold levels.

Traffic performance data collected with and without the system indicated the system improved traffic flow and reduced delay. Researchers documented several lessons learned during the project and provided recommendations for future implementers.

Other Reference Number
Report No. RC-1500
Pages
84
Publication Sort Date
Publisher
Michigan DOT
Source ID
1338
Title
Evaluation of the Dynamic Late Lane Merge System at Freeway Construction Work Zones: Final Report
UNID
EA6EF771D028276385257C160040F103
Source Review
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