Real-Time Monitoring System

Transcription

1 Real-Time Monitoring System The University of Oklahoma Hazem Refai, Ph.D. NATMEC June 5, 2012 Dallas, TX

2 Outline: Motivation Brief Review of FHWA Section 1201 Real-Time System Management Information Program State Traffic Data Monitoring and Collection Systems Project Objectives AVC/WIM System Development Extending Continuous Count Site Capabilities. Real-Time Backend Server and Applications Data Validation Software Solution Conclusion Acknowledgment 3

3 Motivation: FHWA Real Time System Management Information Program: To provide the capability to monitor, in real-time, the traffic and travel conditions of the major highways of the United States and to share that information to improve surface transportation system security, address congestions, improve response to weather events and surface transportation incidents, and to facilitate national and regional highway traveler information. 4

4 FHWA Section 1201: Real-Time System Management Information Program Traffic and travel conditions reporting: Report traffic and travel conditions along the metropolitan Interstate highways and other routes of significance. Metropolitan Interstate highways to be completed by November 8, Other routes of significance to be completed by November 8, Full Construction activities reporting: Report close and reopen roads or lanes. 10 minutes or less for highways within metropolitan areas. 20 minutes or less for highways outside of metropolitan areas 5

5 FHWA Section 1201: Real-Time System Management Information Program cont d Roadway or lane blocking incidents and events reporting Report the time when the traffic incident is verified. Roadway Weather Observations reporting: Report confirmed weather conditions that result in hazardous driving conditions or roadway and lane closures. 20 minutes or less of notice of a changed condition. Data quality reporting: Develop procedures for measuring and ensuring the quality of the information provided under the real-time system management information program. 6

6 State Traffic Data Monitoring and Collection Systems Intelligent Transportation System Monitors traffic and travel time information Uses radars and camera. Available in major metropolitan Interstate highways Real-time Data Collection System Collects traffic volume, speed, and classifications and weigh-in-motion information. Uses automatic vehicle classifiers (AVCs) and weigh-inmotion (WIM) systems. Available across the State s roadways and highways. Non-real-time. 7

7 Project Objectives: Extend the capabilities of AVCs and WIM systems by outfitting the sites with inexpensive hardware and software solutions. Develop a backend server for data collections and visualization of real-time traffic, weather, and road surface conditions. Develop software solutions to validate data quality. Automate the the system and its processes. Integrate into the State real-time system management information program. 8

8 But First, is AVC data useful for real-time systems? 9

9 Extending AVC/WIM capabilities Improve AVC/WIM Internet connectivity Deploy embedded computing system Interface weather station Interface road surface temperature probe(s) 10

10 ODOT Data Collection system Oklahoma Department of Transportation (ODOT) has approximately 80 Peek ADR 2000 devices and 20 IRD isinc Lite. 11 Maps of state or metro scale. Color Coded Click on icon for more details

11 Extending AVC/WIM Capabilities Wireless Connectivity 12

12 Cellular Network Widely, available Easily provisioned wherever there is a tower Highways are a special service target for service providers High data rate service providers constantly upgrading Low latency IP enabled connections can be handled in parallel 13

13 Extending AVC/WIM capabilities Embedded Computing REECE Roadside Embeddable Extensible Computing Equipment 14

14 REECE Device Capabilities Full Linux O/S IP Addressable Direct Device Communication or Server Control Available Connectivity 8 RS-232 Serial Ports 4 USB Ports 16 channel 16-bit 100KHz A/D Converter Fast Ethernet and more. 15

15 REECE Device Capabilities Low Power Consumption 9.4W fully loaded Successfully deployed on 80W solar panels and 200Amp/hour battery. High Temperature Tolerance -40 F to 185 F Input Power 7-25VDC External Step-Down enables AC or different voltages Optional Out of Band Management Available Wireless Device Auto-Detection of Supported Devices Flash storage (1 Gbyte) 16

16 Extending AVC/WIM capabilities Weather Station Every 15 minutes Main Server accessible by ODOT 17

17 Weather Station 18

18 Extending AVC/WIM Capabilities Road Surface Condition- Temperature Probes Temperature of the ground below the surface of the road 19

19 Real-Time Back-End Server and Applications ODOTPeekScheduler Daemon checks SQL database of registered sites Schedules downloads Select devices that have not been monitored in the last N minute- run download program. Logs result of download process ODOTMonitor Checks download process log for exceptions Generates alerts to configurable addresses ODOTRealTimeProcessor Implements real-time data processing Update database Presents information 20

20 Real-Time Traffic data: Classes 21

21 Real-Time Traffic data: Speed 22

22 Real-Time Weather Data 23

23 Validation Software Solution Monitor the wireless network and Internet connectivity. Monitor the health of sensors, AVCs, and WIM systems. Examine traffic data for unusual traffic patterns: excessive zeros, classes, speed, vehicle rate, etc. Examine real-time traffic data with historical data per site, lane, date, and time. 24

24 Validation and Error Visualization General errors: ADR, network, or others Long-term overview 25

25 Validation Excessive Zeros 26

26 Validation Excessive Vehicle Rate 27

27 Validation Excessive Vehicle Rate 28

28 Validation Excessive Classes 29

29 Validation Historical Traffic Data 30

30 Conclusions States have many components to implement FHWA real-time system management information program. States need to take advantage of their investment in traffic data collection systems. With minimal additional investment, Non-real-time AVCs and WIM systems could be used to monitor traffic flows, roadway incidents, and road surface conditions. Backend server(s) and databases required for realtime traffic data processing and dissemination. Data validation is essential to guarantee the quality of the provided information 31

31 Acknowledgement The work has been funded by the Oklahoma Transportation Center as well as the Department of Transportation. In particular, I thank Lester Harragarra (ODOT retiree), Aaron Fridrich (Data Collection Branch Manager), and Brian Thompson (Automatic Traffic Section Supervisor). 32

32 Thank you 33

33 VPN Network, fault tolerant, and Security