Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT,...
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Transcript of Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT,...
![Page 1: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/1.jpg)
Using GPS to Track Pole Truck Turning Movements
Presented by:
John Wolf, PE
Senior Designer
ODOT, Region 1 Preliminary Design
&
Ron Singh, PLS
Chief of Surveys/Geometronics Manager
ODOT, Technical Services
![Page 2: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/2.jpg)
The Problem
• Intersection at Bennett Road & US 30– High volume, multilane highway– 3 Crashes in 2008 involving passenger cars and log
trucks– 2 injuries and 1 fatality resulted
• Permitting issue regarding overhang on long loads– Maximum Overhang was dependant on wheelbase
and trailer type– Overhang was measured from rear axle
• Pole trucks need access to pole yard
![Page 3: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/3.jpg)
Bennett Road
Conflict Point
![Page 4: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/4.jpg)
Bennett Road
![Page 5: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/5.jpg)
Accidents at Bennett Road
![Page 6: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/6.jpg)
Accidents at Bennett Road
![Page 7: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/7.jpg)
The Challenges
• Timing was critical– Motor Carrier issued a pilot car requirement on log trucks with
large overhang, effective 9/12/08, for over 260 permit holders
• Variable vehicle configurations (What should be analyzed?)
• Pivoting trailer bunks influence log sweep path• Turning movement software limitations?• The need to applying the turning movements to multiple
situations– Multiple intersection configurations– Freeway ramp terminals– Multilane Roads
![Page 8: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/8.jpg)
Unique Elements of A Pole Truck
Adjustable Stinger Hitch and Compensator
Front Bunk/Pivot Point
Rear Bunk/Pivot Point
Large OverhangLong Wheelbase
![Page 9: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/9.jpg)
Extendable Stinger
12’6” Total Length
5’6” Available Adjustment
Compensator
Vehicle #2
![Page 10: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/10.jpg)
13’
12’
![Page 11: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/11.jpg)
AutoTURN v5.1
• AutoTURN is a CAD-based program that simulates low speed turning maneuvers for highway vehicles
– Vehicle inputs• Default vehicle configurations• User defined vehicle configurations• Inputs include number of axles, axle spacing, tractor/trailer
length, and distance to pintle hitch– Limitations
• AutoTURN v5.1 does not account for adjustable length “stinger” pintle hitch
• Turning accuracy for this type of tractor/trailer uncertain
![Page 12: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/12.jpg)
AutoTURN Inputs
Default truck templates
Modified pole truck templates
![Page 13: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/13.jpg)
AutoTURN Outputs
![Page 14: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/14.jpg)
Course of Action
• Collected data from ODOT Motor Carrier on common pole truck configurations
• Research other turning simulator software• ODOT Maintenance staff coordinated field
testing of two pole trucks using GPS tracking data
Note: ODOT Motor Carrier Division also collected data on accident history of pole trucks on Oregon highways and neighboring states log truck permitting requirements
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OREGON STATE FAIRGROUNDS – TEST SITE
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The Survey Approach
![Page 17: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/17.jpg)
Truck Turning Sequence
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Test Vehicle #2
Ribbons Spaced at 5’ Intervals From Rear Bunk
5’ 5’5’5’5’
12’ Between Cones
12’ Between Cones
Cones Offset 2’ from Path for Driver’s Side Front Tire
GPS Devices
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After Data Collection
• Create vehicle configurations to replicate field test
• Run AutoTURN analysis
• Compare results
• Run sensitivity analysis of sweep path based on overhang length
• Report Results to Motor Carrier and the Trucking Industry
![Page 25: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/25.jpg)
No Scale
![Page 26: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/26.jpg)
RAW GPS DATA COLLECTED
![Page 27: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/27.jpg)
![Page 28: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/28.jpg)
![Page 29: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/29.jpg)
Comparison of Field Tests to AutoTURN – Vehicle #1
![Page 30: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/30.jpg)
Comparison of Field Tests to AutoTURN – Vehicle #2
![Page 31: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/31.jpg)
General Findings of Field Test and Analysis
• Sweep path is dependent on vehicle configuration and length of overhang from the rear bunk
• Sweep path is the same for both left and right turns• AutoTURN v 5.1 reasonably predicts pole truck turning
movements for various conditions– Path generated using AutoTURN v 5.1 predicted log sweep
within 2’ for Vehicle #1 and 1’ for Vehicle #2 compared to GPS– AutoTURN's maximum error in the trailer off tracking was
between ½’ and 2’ (2’ occurred as the vehicle exits the curve) – Multiple curves compound the error in the AutoTURN software
![Page 32: Using GPS to Track Pole Truck Turning Movements Presented by: John Wolf, PE Senior Designer ODOT, Region 1 Preliminary Design & Ron Singh, PLS Chief of.](https://reader036.fdocuments.in/reader036/viewer/2022062511/55157ca755034674578b53d1/html5/thumbnails/32.jpg)
Outcomes
• ODOT Motor Carrier changed permitting requirements for overhang, effective 11/24/2008– Length of overhang was limited to 1/3 Wheelbase with
a 25’ maximum for multilane roads– Changed the point which overhang is measured from– Lifted the temporary pilot car restriction for vehicles
meeting these requirements– Requirements are posted at:
http://egov.oregon.gov/ODOT/MCT/• Currently investigating an intersection
improvement project at US 30 and Bennett Road to better accommodate pole trucks
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Questions?