?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F730%2F&rft.title=Better+Junction+Control+with+Bus+Priority&rft.creator=Aufderheide%2C+Helge&rft.creator=Colombo%2C+Alessandro&rft.creator=Elson%2C+Torran&rft.creator=Lees-Miller%2C+John&rft.creator=Lim%2C+Sean&rft.creator=Rock%2C+Kat&rft.creator=Saxton%2C+M.&rft.creator=Swierczynski%2C+P.&rft.subject=Transport+and+Automotive&rft.description=The+problem+was+to+design+a+traffic+light+controller+for+a+set+of+neigh-+bouring+junctions%2C+which+gives+priority+to+incoming+buses+while+ensuring+a+degree+of+fairness+to+the+general+traffic.%0D%0AThe+team+has+developed+three+complementary+approaches%2C+that+present+different+strengths+and+weaknesses+and+might+be+applicable+in+different+junction+configurations+or+traffic+conditions%3A%0D%0A1.+A+continuous-variable%2C+discrete-time+optimisation+approach+for+de-+termining+the+fraction+of+green+time+to+give+to+each+arm+of+a+junc-+tion+during+the+next+traffic+light+cycle%2C+in+order+to+minimise+total+weighted+squared+vehicle+waiting+times%2C+with+more+weight+on+buses+than+on+cars.%0D%0A2.+A+piece-wise+linear+ordinary+differential+equation+model+of+queue+length+dynamics+on+a+junction+arm%2C+based+on+flux+of+vehicles+into+and+out+of+that+arm.%0D%0A3.+Adiscrete-variable%2Cdiscrete-timeMarkovDecisionProcessapproach.+The+state+of+the+system+is+comprised+of+vehicle+queue+lengths+and+the+junction%E2%80%99s+current+stage.+The+action+is+to+stay+in+the+current+stage+or+move+to+the+next+stage.+An+optimal+policy+minimises+long+run+expected+discounted+weighted+delay.&rft.date=2013&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F730%2F1%2FESGI91-Halcrow_CaseStudy.pdf&rft.identifier=++Aufderheide%2C+Helge+and+Colombo%2C+Alessandro+and+Elson%2C+Torran+and+Lees-Miller%2C+John+and+Lim%2C+Sean+and+Rock%2C+Kat+and+Saxton%2C+M.+and+Swierczynski%2C+P.++(2013)+Better+Junction+Control+with+Bus+Priority.++%5BStudy+Group+Report%5D+++++