columbia county road department safety awareness pole truck rear overhang tail swing
TRANSCRIPT
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Columbia County Road Department Safety Awareness
Pole Truck Rear Overhang Tail Swing
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WARNING: Long Load
The rear overhang on pole trucks swing wide, quickly and unexpectedly.
Common problem areas are:• Bachelor Flat & Hwy 30 intersection• Old Portland Road & Hwy 30 intersection• Scappoose-Vernonia Road curves• Hwy 47 curves
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Three crashes in 2008 with passenger cars and pole trucks. Two of which were injuries and one a fatality.
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Don’t be a Statistic Drive Defensively
• At intersections – don’t pass a pole truck when it is turning
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Be AlertBe Cautious
• When meeting a long load pilot vehicle, avoid meeting the long load on a curve
•If on a curve, move as far onto the shoulder as possible
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The travel swing of a long pole truck can cross completely over the adjacent lane, depending on the sharpness of the curve or intersection
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Don’t let this happen to you…
Or your family
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Be aware of the danger
Drive Defensively
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Unique Elements of A Pole Truck
Adjustable Stinger Hitch and Compensator
Front Bunk/Pivot Point
Rear Bunk/Pivot Point
Large OverhangLong Wheelbase
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A field study was conducted by ODOT at the State Fair Grounds
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Truck Turning Sequence
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A pole Truck making a left turn
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Within a second, the load moves from mostly in its lane….
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Into your lane….And if you are not expecting or anticipating this…into your windshield!
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Turn completed and the pole truck is on its way…Make sure that parts of your vehicle are not hanging off the end of the load.
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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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No Scale
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Turning Lane North Slow Ln North Fast Ln
Projected Swing Paths For :19.2 ft overhangs28 ft overhangs42 ft overhangs
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Turning Lane North Slow Ln North Fast Ln
Projected Swing Paths For :25.3 ft overhangs34.3 ft overhangs47.5 ft overhangs
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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
View the entire study at www.co.columbia.or.us Road Department
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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