TRAFFIC INFORMATIONSYSTEM Presented by : Anil Kr. Chhotu (11ID60R06) Pranav Mishra (
INTRODUCTION Traffic information system may be defined as aninformation system which involves the collectionand processing of current traffic data by trafficcontrol agencies for dissemination of suchinformation to the users.
WHY T.I.S. ???? Traffic congestion has always been a seriousproblem for commuters in the metropolitan areasaround the world. It causes unpleasant andunpredictable delay. With a good T I S in place the users can reactto congestion by taking an alternative lesscongested route based on the traffic informationthey receive.
T.I.S. helps to Monitor and manage traffic flow. Reduce congestion. Provide safety. Enhance mobility. Reduce energy consumption. Reduce pollution. Develop a multi-modal public transport enquiry system to encourage the public to use public transport services
ELEMENTS OF T.I.S. T I S consist of 3 key elements, namely Traffic information data collection Data Processing Information Dissemination Data Processin Information g Dissemination Data collection
Information To Be Shared Transit Routes New Roads Transit Schedules Accidents Turning restrictions Incidents Traffic Conditions Speed Restrictions Operational Direction Controls Statistics Lane Closures Trends Road Diversions Usage Delay time Congestion Travel time
It involve a central authority to collect, process and disseminate the data. Data of vehicle speed and traffic flow are calculated by ◦ Embedded censors. This data is sent to T.M.C. for processing and analyzing. The result of this analysis is disseminated via ◦ Radio broadcasts. ◦ Internet. ◦ Variable message signs. ◦ Direct to user on demand. Disadvantage ◦ Cost intensive.
Limited coverage…? The problem of limited coverage is solved to a limit by use of PROBE vehicles. These are the vehicles which are fitted with devices to collect and transmit data to TMC at regular intervals.
OLSIM Along with real time situation, it also forecasts the situation 30 min. and 60 min. hence. Real time data are collected from LOOP DETECTORS, and processed to give real time information. For forecasting, actual traffic data from loop detectors are combined with heuristic data from VMS, TWS. It has been proposed at North Rhine- Westphalia, Germany. Data collected from loop detectors are ◦ Number of vehicles ◦ Average speed of vehicles. ◦ Average occupancy. All the processed information is integrated in a Java applet and can be accessed by any user on web.
Setup of OLSIM T.I.S. The information can be accessed from website www.autobahn.nrw.de
Decentralized system It is a zero public infrastructure vehicle based traffic information system. A traffic situation analysis is performed in each individual vehicle and the result is transferred via wireless data-link to all surrounding vehicles in the local neighborhood.
Why decentralized T.I.S…??The problems with Centralized T.I.S.A large number of sensors is needed to be deployed inorder to monitor the traffic situation.The traffic information service is limited to streets wheresensors are integrated.Traffic information is distributed with a relatively highdelay (typically in the range of 20-50 minutes).It is not suited for vehicle-to-vehicle emergencynotifications.Cannot include specific details on the area close to thecurrent position of the driver.An extremely large investment for the communicationinfrastructure (sensors, central unit, wired and wirelessconnections) is necessary.
SOTISSelf-organizing Traffic Information System (SOTIS):• Each vehicle monitors the locally observed traffic situation by recurrently receiving data packets with detailed information from other vehicles.• A traffic situation analysis is performed in each individual vehicle and the result is transferred via wireless data-link to all surrounding vehicles in the local neighborhood.• No sensors along the highways, no central units and no broadcast stations or cellular networks are needed.• The complete system can be easily deployed and service charges for the end user can be avoided
SYSTEM DESIGNThe SOTIS system design is based on the following guidelines and technical assumptions: The SOTIS technique should be able to provide reliable travel and traffic information for the area that can be reached in the near future by the driver. Each SOTIS vehicle is equipped with a satellite navigation receiver (GPS), a digital street map, a simple digital radio and a small data processing unit. The SOTIS service should be available at each position, on highways and in cities, at any time. For covering large area with limited bandwidth, simple control systems should be used to avoid data packet collisions.
Types of Report by SOTISPeriodic report.Emergency report
Driving route based VisualTIS As jam level represents average speed of vehicles, TIS usually reports same jam level to all users. Whereas different drivers have different perception of same traffic situation. ◦ At intersections. ◦ At some hot spot. Hence, an improved TIS was proposed to provide specific data to specific users based on routes or destination. Information is collected by on-vehicle camera and sensors. Each user gets data according to his own route
This system is applied for routes with obvious deviations. If the route of driver is known, potential deviations on the route can be identified and information for that user can be customized. The system consist of two parts – ◦ Vehicles, with modules of Communication. Location detection. Visual information. Input/display ◦ Traffic centre, with modules of Communication Visual information collection to analyze. Visual information distribution according to route plan. This system can provide personalized service.