ACS Lite Project Overview - Traffic Signal Systems Committee
ACS Lite Project Overview - Traffic Signal Systems Committee
ACS Lite Project Overview - Traffic Signal Systems Committee
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>ACS</strong> <strong>Lite</strong>“Very High Altitude” Evaluation ResultsTRB - Adaptive <strong>Traffic</strong> <strong>Signal</strong> Control WorkshopWashington, DCJanuary 11, 2004Slide 55<strong>ACS</strong>-<strong>Lite</strong> testscenarioStart with optimizedsettingsStart with bad Offsets(no split adjustment)Start with bad side-streetSplits(no offset adjustments andprogression bias)Changing volumes &turning proportionsvs. “Do nothing”,initially as <strong>ACS</strong>-<strong>Lite</strong>Delay (-0.0%, +0.7%)Travel Time (-0.6%,+2.4%)Delay (-4.2%, +0.9%)Travel Time (-4.0%,+1.3%)Delay (-3.3%, +2.2%)Travel Time (-4.9%,+6.8%)Delay ( -28%, -7.4% )Travel Time ( -6.4%, +3.5% )Conclusion<strong>ACS</strong>-<strong>Lite</strong> “does no harm”<strong>ACS</strong>-<strong>Lite</strong> can find a goodset of offsets<strong>ACS</strong>-<strong>Lite</strong> usually makesimprovement<strong>ACS</strong>-<strong>Lite</strong> providesconsistent delay reductionU.S. Department of TransportationFederal Highway AdministrationFHWA Contract No.DTFH61-02-C-00047
Change language