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.
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.
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