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Tennesee  http://www.tdot.state.tn.us/

http://www.state.tn.us/sos/rules/1680/1680-07/1680-07-01.pdf

Pilot/Escort Vehicle is Required
10’ to 12’ 6”-1 escort if the pavement is less than 20’ wide
12' 6" to 14'-1 rear escort any interstate highway or 4-lane road; 1 front escort on 2-lane road  
Over 14' to 16' wide requires 2 escorts on all highways
Over length- 85' long-1 rear; 120' long- 2 escorts
Over height- 1 lead escort (over 15' high)
Flagperson on bridges less than 20’
Requirements for Pilot/Escort Vehicle
General:
Signs:“OVERSIZE LOAD” sign (bumper or roof mounted) w/ black letters (10” high x 1 1/2” brush stroke) on yellow background visible from front & rear; 
made from metal or durable wood or cloth or heavy canvas (if they can be securely fastened to the vehicle with a flat surface backing up the entire area of the sign.
Lights: Rotating or strobe type amber light visible from 500’; horizontal placement visible 360 degrees
Flags: 2 red/fluorescent orange flags; 18” square min.; mounted at 40-70 degree angle on vehicle’s roof rack
Additional equipment: 2-way electronic communication; 2-5lb. Fire extinguishers; “STOP”/”GO” paddle (18” w/ 6” letters); 
Safety orange vest/shirt/jacket; hand-held red flag (18” square); 2 “OVERSIZE LOAD” banners (black letters on yellow background); 
hard hat; reflecting triangles or 18” traffic cones  Recommended (not required): hand-held 2-way electronic communications; flares; maps; height pole

TENNESSEE
DEPARTMENT OF TRANSPORTATION
SUITE 300, 505 DEADERICK STREET
JAMES K. POLK STATE OFFICE BUILDING
NASHVILLE, TENNESSEE 37219

PHONE: 615-741-3821
HOURS: MONDAY - FRIDAY 8:00 A.M. - 4:30 P.M
CENTRAL TIME

LEGAL LIMITS DESIGNATED HIGHWAY ALL OTHER ROADS
Single 20,000 20,000
Tandem 34,000
34,000
Tridum 42,000 8' of spacing
42,000 9' of spacing
42,000 8' of spacing
42,000 9' of spacing
Gross Weight 80,000
Federal Bridge Formula Appiles
80,000
Width 8'6" 8'6"
Height 13'6" 13'6"
Semi-trailers 53' 53'

OVERHANG None specified in the law, any overhang over 4' requires flags during the day and lights a night

PERMIT LIMITS

ROUTINE ISSUE

Weight:
Single
20,000
Tandem 40,000
Tridum 60,000
Quad 80,000
Gross Weight:
5 Axles
100,000
6 Axles 120,000
7 Axles 140,000
8 Axles 160,000
*Movement with gross weight exceeding 150,000 lbs must be approved by the Structure Division before a special permit can be issued
Length: 120'
Width: 16'
Height: 15'

If load exceeds any of these dimensions or 180,000 lbs., refer to the section on Super Loads.

PERMITS VALID FOR:
Single trip permits are issued for six (6) travel days.

OPERATING TIME
One-half hour before sunrise to one-half hour after sunset, Monday through Saturday, loads that are overweight only may get continuous travel 24 hours 7 days a week.

WEEKEND TRAVEL
Saturday sunrise to sunset, no travel on Sunday.

DIVISIBLE LOADS
Permits will be granted to vehicles that cannot reasonably be dismantled or reduced to the lowest possible form, permits not issued for divisible loads.

EXCEPTIONS
Equipment such as bulldozers with blades or other protruding sharp objects of any kind which create an over width exceeding 10'6" but not exceeding 13'6" will be loaded in such a manner to place the blade or protruding sharp object to the rear of the hauling equipment. No permit will be issued for blades or protruding sharp objects creating width in excess of 13'6". Blades and booms if they can be removed should be shipped separately.

INFORMATION NEEDED TO ORDER A WIDE LOAD, OVERSIZE AND HEAVY HAUL PERMIT
Name and address of applicant, load description, method of moving, overall dimensions, spacings of axles, origin, destination, routes, proposed effective date and address to which permits are to be transmitted and method of transmission. For super heavy and/or extra over dimensional movement, complete and detailed proposal of movement, detailed sketch of vehicle and load, tire size and contact pressures, distance between axles and distribution to axles, overall length, width and height of movement and detailed traffic control proposal.

ESCORTS FOR WIDELOAD AND OVERSIZED SHIPPING

Over 15' highis generally not issued. "Proof of necessity" and proper safety precautions are necessary to be authorized with special routing.

Moves over 16' wide will not permitted without "proof of necessity"
On 2-Lane Highways:
Width over 10' up to 12'6"
Where pavement width (excluding shoulders) is less than 24'
1 Front
Width over 10 up to 12'6" 1 Front
Where pavement width (excluding shoulders) is less than 24'
Width over 10' up to 12'6" 1 Flag person
@bridge structures where road width is less than 20'
Width over 12'6" up to 14' 1 Front
On 4-Lane Highways:
Width over 12'6" up to 14' 1 Rear
On All Highways:
Width over 14' (if approved) 2 (Front & Rear)
Height over 13'6" up to 15' No escort
Special permit needed w/special routing
Height over 15' if approved, using height pole 1 Front
Length over 75' up to 85' Needs light (see signs/It section)
Length over 85' up to 120' 1 Rear
Length over 120' 2 (Front & Rear)
Moving houses 2 (Front & Rear)
Weight GVW over 150,000 lbs-needs approval by TN TDOT
On 4 or More Lanes:
Width over 12' up to 14' 1 Front
Width over 14' up to 16' 2 (Front & Rear)
*Houseboats:
Width over 12' up to 14'
on all 4-lane highways
1 Rear
Width over 14' up to 16'
on all highways
2 (Front & Rear )
*Loads 16' wide and over restricted to Tuesday, Wednesday and Thursday, houseboats over 8' wide will be subject to fees in TN code

Restricted Travel
Movements 85' long or greater in length and/or 12'6" wide will not be allowed within any statewide city limits and all heavily traveled adjoining commercial or residential areas between the hours of 7:00 - 9:00 a.m and 4:00 - 6:00 p.m. from Monday through Friday
*CONTACT STATE FOR ADDITIONAL INFORMATION ON RESTRICTED TRAVEL FOR WIDELOADS, OVERSIZED AND OVERWEIGHT PERMITTED CARGO

SPRING WEIGHT RESTRICTIONS
No restrictions.

Overweight, Oversized & Wide Load Super Loads
Application must be made in writing and contain a detailed proposal of movement, detailed sketch of vehicle and load, tire size, axle spacings, axle weights and overall dimensions. Permit valid for six (6) days.

Loads 16' wide and 150,000 lbs must go to the Bridge Department

Allow four (4) days for processing 

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