VS AG 2001 E

1 April 2001page 1 VSVS--PLUS IntroductionPLUS IntroductionDr. Thomas RiedelEven this knotty problem can be solvedApril 2001page 2 Presentation Contents Company introduction The traffic engineering workflow The workflow support tools Basic understanding of the VS-PLUS algorithm Traffic Stream Display Element Frame Signal Plan Priority Rules Public Transport Vehicle Tracking Examples Single intersection optimization Multiple intersection co-ordination DemonstrationApril 2001page 3 Verkehrs-Systeme Software and Engineering Companysince 1992 Muttenz - SwitzerlandAachenKasselCorvallisInnovati ve solutions combined with competence and experienceA supply of open system platforms, software packages & development with transparent, standardized and freely accessible interfacesQuality controlled workflowsIndependence from the big system suppliers Corporate philosophyBeijingShanghaiApril 2001page 4 Our Products in a WorkflowMIGRA-PlanCROSSIGLISA+PlanningOn line-AuswertungVS-pCoqQuality-Assurancev isualVS-PLUSVS-WorkSuiteDesign and testVISSIMVS-PLUSSIMP arameterSimulated ControllerSiemens PeekSignalbau HuberDambachStoyeAVT BergauerEAGLE (USA)ControlVS-VISTAVS-PLUSC ontrollerParameterApril 2001page 5 Design and Test: visual VS-PLUS Object-oriented planning and development tool for traffic actuated control No skills in programming needed Expert programming panel VS-PLUS Freestyle Open ASCII-Interface for import, export and communication with other toolsApril 2001page 6 Design and Test.

2 VS-PLUS Freestyle Tool for free programming of additional VS-PLUS modules Flow diagram input according to RiLSA Interface to visual VS-PLUS Import of known objects 16 * 16 free parameters Assignment of corresponding functions Generation of C source code Generation of for simulation with VISSIMA pril 2001page 7 Design and Test : vissim (PTV AG) Microscopic traffic flow simulation based on calibrated traffic flow model Tool for comprehensive feasibility studies and capacity analysis Test and preview tool for vehicle actuated signal control in the design phase Easy network and intersection design Bus transit, light rail and freeway simulation Understandable presentation and evaluation outputs Open software interfacesApril 2001page 8VS-PLUS Fully traffic actuated control Traffic control designed for transit signal priority (TSP) Free phase combination and sequence (important for priority driven control) Unlimited number of phases Highly flexible transit priority based on route and trip identification lateness or user defined priority code Proven control package, mProven control package, more than 1,000 installations Full integration with design and test toolsFull integration with design and test toolsApril 2001page 9VS-PLUS.

3 Real-time Control ProcessDetector evaluationTraffic stream evaluationPhasegroupingPhase transition calculationPermanent detector data processingVS-PLUSP arameterPhase switching,security functionsBasicParameterVS-PLUSO peratingSystemApril 2001page 10VS-PLUS : Philosophy Optimized control transparent to road user Short loss times resulting in low environmental impact Green in an reasonable amount of time Road user should not be kept waiting for no apparent reason Operation of signal control with: minimum of cost and manpower highest possible quality of control Control types fully traffic actuated control semi-coordinated control fixed time controlApril 2001page 11VS-PLUS : Traffic Stream Definition Basic independent control unit is: Traffic Stream At least 1 Detecting element 1 Display element Possible traffic streams Automobile traffic Bus transit Light rail transit Pedestrians Bicyclists Emergency vehiclessame signalcontrolled byindependent traffic streams(events)BUSAuto trafficAuto trafficLane 2 Lane 1 April 2001page 12VS-PLUS : Display Element Definition Display Element : common definition for all types of display means Possible Display Elements Signal group Pedestrian push button feed back Variable message sign LED of the controller operating panel Possible Traffic Stream assignments Several Traffic Streams control 1 Display Element Several Display Elements are controlled by 1 Traffic StreamApril 2001page 13VS-PLUS : Frame Signal Plan Definition Traffic Stream based coordination tool hard coordination passive, active green band extension fully traffic actuated mixed typesAdvancegreenCallgreenExtendgreenFra me Signal PointerApril 2001page 14VS-PLUS.

4 Types of InterventionProtected based on traffic demandGreen commandStart of greentgmintg min1tg min2tg max1tg max2 End of greenType of intervention 5 Type of intervention 4 Type of intervention 3 Type of intervention 2 Type of intervention 1 Absolutely protectedframe signal independentframe signal dependentApril 2001page 15VS-PLUS : Frame Signal Plan Example Example Coordinated auto traffic fully traffic dependent BUS--> green is possibleat any time in the cycleApril 2001page 16VS-PLUS : Frame Signal PlansTS 1TS 2TS 3TS nTS 4TS 1TS 2TS 3TS nTS 4TS 1TS 2TS 3TS nTS 4 Frame Signal Plan for fully traffic actuated operationFrame Signal Plan for coordinated actuated operationFrame Signal Plan forcoordinated fixed time operationApril 2001page 17VS-PLUS : Priority RulesPriority Class 1(PC 1)General PurposePriority Class 2(PC 2)PublicTransitPriority Class 3(PC 3)EmergencyVehiclesTraffic stream moves into Level 2,when max. waiting timeis reachedIncreasing PriorityPriority Element 4(PE 4)Priority Element 5(PE 5)Priority Element 6(PE 6)Priority Element 1(PE 1)Priority Element 2(PE 2)Priority Element 3(PE 3)Priority Level 2(Frame signalindependent)Priority Level 1(Frame signal dependent)April 2001page 18VS-PLUS : Transit Signal Priority (TSP) Multiple levels of priority treatment Transit vehicle s lateness (in minutes) or user defined priority code Competing transit priority calls Special treatment of trailing trains/buses (bunching) VDV communication protocol Multiple calling points 2 advance calls Confirmation Checkout The algorithm has been patentedApril 2001page 19VS-PLUS : Transit Priority Event SequenceTheoreticalTravelPathExpected ArrivalDelayDelay5 Advance Call2.

5 Advance CallConfirmationCheckoutTerminateConflic tPhasesBlockConflictPhasesImplementation April 2001page 20VS-PLUS : Transit Vehicle Advance Call 1 ConfirmArrival/CheckoutAdvanceCall 1 AdvanceCall 2 BusStopWorst Travel TimeTheoretical Travel TimePredicted Arrival WindowApril 2001page 21VS-PLUS : Transit Vehicle Advance Call 2 ConfirmArrival/CheckoutAdvanceCall 1 AdvanceCall 2 BusStopWorst Travel TimeTheoretical Travel TimePredicted Arrival WindowActual Travel Time of BusApril 2001page 22VS-PLUS : Transit Vehicle ConfirmationConfirmArrival/CheckoutAdvan ceCall 1 AdvanceCall 2 BusStopWorst Travel TimeTheoretical Travel TimePredicted Arrival WindowActual Travel Time of BusApril 2001page 23 Even this knotty problem can be solvedExamplesApril 2001page 24 Examples RiLSA (German Traffic Standard Example) Vancouver, Canada:intersection 160 Cologne, Germany:intersection 804 Basle, Switzerland:intersections 143 to 148 Lucerne, Switzerland:downtownApril 2001page 25 Example: RiLSA (German Traffic Standard Example)April 2001page 26 Example: Vancouver intersection 160 Situation map in visual VS-PLUS: Showing at the right side: detectors (DET), traffic streams (VS and Bus), and signal heads (red numbers) Showing at the left side all parameter groups to be definedApril 2001page 27 Example: Vancouver intersection 160 Frame signal plan with visual VS-PLUS Showing all permissive periods for individual traffic streams (VS) Showing all time permissivity for busses (traffic streams 15 to 18)April 2001page 28 Example: Vancouver intersection 160 Simulation with vissim Individual cars are shown in dark blue A bus is visible in light blue going to turn to the left The example includes normal busses and express busses using the same lane but having different levels of priority at the 2001page 29 Example.

6 Vancouver intersection 160 Signal and detector protocol with VS-VISTA Showing green, amber and red phases of the signal groups (SG) Showing detector data (Det) Dark blue: impulse Light blue: continuous occupationApril 2001page 30 Example: Vancouver intersection 160VS-PLUS monitor withVS-VISTA Showing how the frame signal plan is filled with decisions Showing more information about internal VS-PLUS variablesApril 2001page 31 Example: Vancouver intersection 160 Manual testing surface with VS-VISTAA pril 2001page 32 Example: Cologne intersection 804 April 2001page 33 Example: Basle intersections 143 to 148 Coordinated corridor with 6 VS-PLUS intersections Coordination includes public transportation priority for light railApril 2001page 34 Example: Lucerne downtown Coordinated corridor with more than 12 VS-PLUS intersections Coordination includes public transportation priority for bussesApril 2001page 35 Example: Lucerne downtown (detail)