GIS Tool to Optimize Route Planning to Improve Energy Efficiency of Motor Vehicles in Sri Lanka

Silva S.A Bandara J.M.S.JGIS Tool to Optimize Route Planning to Improve Energy Efficiency of Motor Vehicles in Sri Lanka

IntroductionUrban traffic congestion is one of a main problem of National road network.Effects the economy of the country.Waste lot of vehicle energy and time of people.Bad route planning and management is one of a main reason

Bad route planningAir pollutionNoise pollutionWaste fuel energyIncrease the idle time of vehicles

Source: Fleet management using GIS and GPS, Silva S.A, Bandara J.M.S.J, 2009

3Bad Route PlanningFlyovers as measure to improve intersection Capacity, Tissa U. LiyanageFlyovers are not a good solution for traffic congestion. However, it is a good strategy to eliminate the delays at railway crossings.Performance of the One way traffic systems in Colombo and Maharagama, Tissa U. Liyanage, W. Janaka WeerawardenaImportance of analyze the network before implement a traffic management plan.

Energy efficiency, Emission level and Traffic FlowTraffic congestion decreases the speed of the vehicle and increase the idle time.Similarly, it increases the emission levelEmission level is a good indication of efficiency of road networkVehicle travel time of road links greatly affects to the emission levelLow travel time indicates the low emission level and saving of energy

Speed vs. Traffic Flow Relationship

A Typical Speed Flow RelationshipAvailable System (TRANSPLAN)TRANSPLAN is developed by Transport Engineering Division, University of Moratuwa

Traffic planning model

ShortcomingsReliability of traffic flow estimationCannot find the alternative pathsEmission level cannot estimate

ObjectiveDevelop a GIS based model which is called Integrated Highway Management System (IHMS) by customizing the ArcGIS software using Visual Basic (VB 6)

Optimize the management of highways in Sri Lanka.Importance of GIS to Highway ManagementEasy to manage the dataCan identify the locations easily.Network analysis option can used find the alternative paths easily.ArcGIS customization helps to users to combine the analysis tools in GIS.Developed programs can be used without having good knowledge of GIS.

IHMS optionsManage the road network dataFind the alternative paths and best pathsMonitor Emission levelManage the accident dataEstimate the traffic flows

Alternative PathsHABEFCDGLink BarrierLink Independent pathsNode independent PathABEFCDGHNode BarrierNetwork analysis option of IHMS

Estimate the emission levelMethodology is defined in the study of Development of a vehicle emission inventory for Sri Lanka by L.U Peethika

V = Total vehicle flow rate of the zoneL = Total road length of the zonePV = Percentage of vehicle typePF = Percentage of vehicle by fuel typeEF = Emission factor

Estimate the emission levelTravel time of road links also should considerHigh traffic flow of road links affects to lot of congestion and increase the emission level

V = Total vehicle flow rate of the zoneL = Total road length of the zonePV = Percentage of vehicle typePF = Percentage of vehicle by fuel typeEF = Emission factorT = Total travel time of the vehicles

Emission option of IHMS

Estimate the traffic flowCombination of capacity retrain and TRC method used to estimate the traffic.Silva S.A, Bandara J.M.S.J Bandara, Improvements to traffic assignment strategies and network analysis and GISAlternative routes is concernedEffect of Land use pattern and road type, class and condition also concerned.

Flow Estimation Model of IHMS

Case Study (Southern Province)The route which has high traffic flows

Case Study (Southern Province)The improved alternative path which is used go from Ambalangoda to Tangalla.

Emission Level of Zones

RRRRIIIReduction of Total Emission LevelExisting estimation of total emission level in southern province= 3170 k

Total estimation level of southern province after improvement= 3047 k

Percentage of emission level drop= (3170 3047) / 3170= 4 %

K = Constant used for represent the emission factorsAssumptionsSpeed of a road link is inversely proportional to traffic flow of a road link.Emission factor of vehicles is same for all vehicles and not varying with the speed of vehicles.Travel distance is the main influenced factor to choose the routes.

ConclusionIHMS can be used to plan the road network in efficient way by minimizing the traffic congestion.Minimize the fuel waste and emission level.Road geometry and traffic flow pattern also should concern to estimate the emission level.Travel flow pattern of the day also should concern to estimate the emission levelModel should publish in web to manage the national road network data in an efficient manner.Thank You