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Oregon Department of Transportation. Oregon Green Light Project 4 Mainline Preclearance Systems u Weigh-in-Motion (WIM) Scales u Automated Vehicle Identification.

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Presentation on theme: "Oregon Department of Transportation. Oregon Green Light Project 4 Mainline Preclearance Systems u Weigh-in-Motion (WIM) Scales u Automated Vehicle Identification."— Presentation transcript:

1 Oregon Department of Transportation

2 Oregon Green Light Project 4 Mainline Preclearance Systems u Weigh-in-Motion (WIM) Scales u Automated Vehicle Identification (AVI) Systems u Transponders 4 Travel Advisory Systems u Downhill Speed Information Systems u Road Weather Information Systems (RWIS)

3 How Is This Accomplished? Weigh-In-Motion systems check the vehicles weight and height An automatic vehicle identification reader checks state records for registration, tax status, safety inspection status The driver is signaled with an in-cab device to either Report to the station or Bypass

4 Transponder reader Over-Height detector Weigh-in-motion single load cells and axle sensors Mainline Preclearance Oregon Green Light System Checks: Truck Size, Weight, Height Transponder Signal to Identify Vehicle/Carrier Records Related to Registration, Tax, and Safety

5 Single-Load-Cell (SLC) Scale Installation

6 Axle Sensor Installation

7 Loop Detectors System Electronics

8 Automated Vehicle Identification (AVI) & Over Height Detection AVI Antennas Infra-red Over Height Sensor

9 TYPICAL SITE LAYOUT AVI READERS READ THE TRUCKS TRANSPONDER WIM SCALES MEASURE THE VEHICLES WEIGHT LOOPS AND AXLE SENSORS DETERMINE LENGTH, SPEED AND AXLE SPACING

10 TYPICAL SITE LAYOUT AVI READERS READ THE TRUCKS TRANSPONDER WIM SCALES MEASURE THE VEHICLES WEIGHT LOOPS AND AXLE SENSORS DETERMINE LENGTH, SPEED AND AXLE SPACING OVER HEIGHT DETECTOR CHECKS IF THE VEHICLE IS OVER LEGAL HEIGHT

11 TYPICAL SITE LAYOUT AVI READERS READ THE TRUCKS TRANSPONDER WIM SCALES MEASURE THE VEHICLES WEIGHT LOOPS AND AXLE SENSORS DETERMINE LENGTH, SPEED AND AXLE SPACING AVI READERS SEND A RED OR GREEN LIGHT TO THE TRANSPONDER OVER HEIGHT DETECTOR CHECKS IF THE VEHICLE IS OVER LEGAL HEIGHT

12 TYPICAL SITE LAYOUT AVI READERS SEND A RED OR GREEN LIGHT TO THE TRANSPONDER AVI READERS READ THE TRUCKS TRANSPONDER WIM SCALES MEASURE THE VEHICLES WEIGHT LOOPS AND AXLE SENSORS DETERMINE LENGTH, SPEED AND AXLE SPACING Green Light OVER HEIGHT DETECTOR CHECKS IF THE VEHICLE IS OVER LEGAL HEIGHT

13 Mainline Preclearance Transponders Dedicated Short-Range Communications

14 22 Oregon weigh stations operational Green Light sites

15 1,600,000 1,400,000 1,200,000 1,000, , , , , , ,000 1,100,000 1,425,000 1,500,000 MCTD began keeping track of the number of trucks that bypassed weigh stations in January Four weigh stations were preclearing an average of 51 trucks a day. There are now 22 stations preclearing 4,400 trucks a day. Today, nearly 4,200 companies are equipped With more than 40,000 transponders 1,375,000 1,606,000

16 Information from the American Trucking Association estimates the cost of operating a truck to be $1.96/minute.

17 An independent evaluation determined that the average time a truck spends in a weigh station is five-to-eight minutes.

18 Based on these figures the carrier industry overall currently saves more than 125,000 hours of travel time and $14.7 million in operating cost annually.

19 Types of Data Collected Individual axle weights Axle group weights Gross Vehicle Weight (GVW) Axle spacings Vehicle Classification Date/Time stamp Reports (hourly, daily, weekly, monthly) Speed Equivalent Single Axle Loads Weight warning/violation

20 Benefits of Data Collection State Government Where taxpayers demand efficiency and cost savings 4Highway Planning u Traffic volume counts u Vehicle classifications u Frequency patterns (minimum/peak) u Build for longevity (performance-based) 4Bridge Planning u Designs based on Weight/Configuration data u Repair/Re-design of existing structures (change in patterns) 4Infrastructure Preservation u Save an estimated $20 million annually in Oregon in maintenance costs u Address the problem with pavement damage from overweight trucks, estimated to cost the U.S. $670 million annually

21 OSU Green Light Preclearance Systems identify and stop more overweight trucks that would otherwise be allowed to proceed and cause millions in highway pavement damage Dr. Chris Bell Independent Evaluation

22 The Green Light Program The DEQ completed emission testing in The results found that trucks bypassing a weigh station experienced a 57% increase in fuel economy, and reduced harmful pollutants (particulate matter, carbon dioxide, carbon monoxide, nitrogen oxides, and hydrocarbons) by 36% to 67%. One study in particular found that these reductions achieve the highest per-value ton of pollutant reduced.

23 Winner of a 2000 Best of ITS Award Semi-finalist 2001 JFK Harvard Innovations in Government Award

24 The Green Light weigh station preclearance program is a winner of the top award in the American Association of State Highway Transportation Officials (AASHTO) 2002 Team Excellence Program. The Exemplary Partner award recognizes the work of ODOTs Green Light team. 64 teams from around the U.S. entered the competition AASHTO Award Oregon Green Light wins AASHTO Excellence award

25 Comments or Questions? Contact the Oregon Department of Transportation David Fifer


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