Investigating the Feasibility and Benefits of Integrating Dynamic Vehicle Probe Data Into Advanced Traffic Management Systems, 10-R9582Printer Friendly Version
Inclusive Dates: 10/01/05 Current
Background - The Federal Highway Administration (FHWA) has established the Vehicle Infrastructure Integration (VII) initiative to improve safety and mobility on the nationís roadways by supporting efforts to integrate standardized traffic management communication infrastructure with vehicle systems. To accomplish this, FHWA intends to utilize the recently allocated public safety 5.9 GHz spectrum and deploy radios capable of Dedicated Short-Range Communications (DSRC). The eventual goal is to establish bidirectional communication between the nationís highway infrastructure and the vehicles that traverse them.
Intelligent transportation systems have historically been implemented through the distribution of geographically dispersed static sensors tied back to a central Advanced Traffic Management System (ATMS). These sensors include inductive loops installed in the freeway pavement, vehicle presence detectors, weather information systems, and closed circuit television surveillance cameras. While this transportation data is extremely valuable for traffic operations and public safety agencies, it limits the system visibility to areas in which the specific sensors are installed. By fusing dynamic vehicle-specific data available from the vehicle's CANbus, such as vehicle speed, air-bag deployment sensors, vehicle temperature data, vehicle brake position, and so on with these statically deployed existing sensors, the ATMS will be provided with more extensive condition data that will offer the agencies more advanced traffic engineering and emergency response capabilities.
Approach - To investigate the feasibility and benefits of integrating dynamic vehicle probe data into an ATMS, a single board computer with a Controller Area Network controller and Global Positioning System (GPS) receiver, will be interfaced with a test vehicle's CANbus. Software is being developed to run on this single board computer to parse and format pertinent information about the vehicle's current state. This information will then be transmitted across a wireless network, deployed at the SwRI test track facility, to representative road side equipment. Then it will be transferred via a wired network to a modified version of a SwRI-developed ATMS simulation environment.
Accomplishments - Project investigators have successfully developed processes that fuse GPS data with CANbus data accessed through a vehicle's diagnostics data interface. In conjunction with this effort, investigators developed applications to manage roadside communications that inject vehicle probe data with ATMS processes. Data is displayed on a user interface mapping application. Further tasks include the integration and field testing of system processes at the Institute test track.