Research Article Implementation and Evaluation of a Traffic Light Assistance System Based on V2I Communication in a Simulation Framework Cristina Olaverri-Monreal , 1 Javier Errea-Moreno , 2 and Alberto Díaz-Álvarez 3 1 Department of Information Engineering and Security, University of Applied Sciences Technikum Wien, Vienna, Austria 2 Department of Electrical and Electronic Engineering, Universidad P´ ublica de Navarra, Pamplona, Navarra, Spain 3 Universidad Polit´ ecnica de Madrid, Instituto Universitario de Investigaci´ on del Autom´ ovil (INSIA), Madrid, Spain CorrespondenceshouldbeaddressedtoCristinaOlaverri-Monreal;olaverri@technikum-wien.at Received 30 October 2017; Accepted 8 February 2018; Published 18 March 2018 AcademicEditor:YuchuanDu Copyright©2018Cristina Olaverri-Monreal et al. Tis is an open access article distributed under the Creative Commons AttributionLicense,whichpermitsunrestricteduse,distribution,andreproductioninanymedium,providedtheoriginalworkis properlycited. CooperativeIntelligentTransportationSystems(C-ITS)maketheexchangeofinformationpossiblethroughcooperativesystems thatbroadcasttrafcdatatoenhanceroadsafety.Trafclightassistance(TLA)systemsinparticularutilizereal-timetrafclight timingdatabyaccessingtheinformationdirectlyfromthetrafcmanagementcenter.TotestthereliabilityofaTLAsystembased onnetworkedintervehicularinteractionwithinfrastructure,wepresentinthispaperanapproachtoperformtheoreticalstudies inalab-controlledscenario.Teproposedsystemretrievesthetrafclighttimingprogramwithinarangeinordertocalculatethe optimalspeedwhileapproachinganintersectionandshowsarecommendedvelocitybasedonthevehicle’scurrentacceleration andspeed,phasestateofthetrafclight,andremainingphaseduration.Resultsshowanincreaseindrivingefciencyinthe form ofimprovementoftrafc fow,reducedgasemissions,andwaitingtimeattrafclightsaferthedriversadjustedtheirvelocityto thespeedcalculatedbythesystem. 1. Introduction Cooperative Intelligent Transportation Systems (C-ITS) make the exchange of information possible through coop- erative systems that broadcast trafc data to enhance road safety.Lab-controlledplatformsprovidethetestbedcondi- tionsrequiredtoperformrealisticexperimentswithmassive amounts of valuable data. Tis allows for the evaluation of a variety of protocols, as well as interaction with in-vehicle systemsandservices[1]. According to research developed in the United States by the National Highway Trafc System Administration (NHTSA), drivers who did not respect red lights in an intersectioncontrolledbyatrafclightcaused from1997until 2004anaverageof51%ofthefataltrafccrashes[2]. Te technology behind trafc light timing programs is rapidly evolving. Te aim is to further develop adaptive signal control technology (ASCT) in an efort to adapt trafc light timing programs to the demands of real-time trafc and thus reduce trafc congestion in urban areas. However, these technologies have only been implemented in a small number of road networks, and the majority of urban areas still have pretimed control systems installed in theirtrafcsystems.Teirpresettimeintervalsarethesame everytimethesignalcycles,regardlessofchangesintrafc volume [3]. Tis pretimed mode is ideally suited to closely spaced intersections where trafc volumes and patterns are consistent. It can be used to provide efcient coordination withothertrafcsignals,sinceboththestartandendofgreen light phases are predefned. On the other hand, pretimed control tends to be inefcient at intersections where trafc arrivalsarerandom.Tiscausesredundantandunnecessary waiting times, signifcant trafc jams, and excessive delays [4]. Some systems use diferent preset time intervals for morningrushhour,eveningrushhour,andotherbusytimes basedonhistoricaldata.Eveniftheinformationofthetrafc lightsisstoredateachtrafcmanagementcenter,itisnotyet Hindawi Journal of Advanced Transportation Volume 2018, Article ID 3785957, 11 pages https://doi.org/10.1155/2018/3785957