Federal & State Regulations | Oversize and overweight movements - Idaho

General requirements

Reducible expectations	The permittee must certify that steps have been taken to reduce the dimensions and/or weight of vehicle and/or load concerned in the permit to legal limitations, or if that is impractical, to reduce the excess to a minimum.
Permit timing	If district approval is needed by the Overlegal Special Permit office, the approval may require up to 24-working hours. The Department may take up to 5-business days for an analysis on a vehicle or vehicle combination not in excess of 250,000 lbs and up to 10-business days for an analysis on a vehicle or vehicle combination over 250,000 lbs. Up to 10-business days will also be used for the review process of an analysis done by a third party.
Method of application	Permits can be obtained at the Department Headquarters, several offices and Ports of Entry, on-line, or through J. J. Keller & Associates, Inc., Trip Permits, at (800) 231-5266.
Payments accepted	The permittee must pay the permit fee at the office where the permit is picked up, unless the permittee has charged it to a credit card or has a permit fee account to which it may be charged.
Electronic permits	Special permits may be either a hard copy or in a digital format.
Route surveys	Requests to transport vehicles and/or loads at weights in excess of the weights allowed on a routine basis will require, at a minimum, an additional review and approval from the overlegal special permit office and may require an engineering analysis when structures are involved on the route(s) to be traveled. A traffic control plan is required to be submitted when operating on 2-lane highways. The plan must be prepared by a licensed engineer or an American Traffic Safety Services Association (ATSSA) certified traffic control supervisor and include specific information when exceeding the following dimensions: • Width exceeds 20' • Length exceeds 150'

Insurance requirements

Liability	The permittee must assume all responsibility for injury to persons or damage to public or private property caused directly or indirectly by the transportation of an oversize or overweight movement. Furthermore, the permittee must hold the Department and all its officers, agents, employees, and servants harmless from all suits, claims, damages or proceedings, which may occur because of the oversize or overweight movement.
Coverage	The permittee or the driver of the vehicle towing overwidth manufactured homes and office trailers is required to carry evidence of general liability insurance in the permitted vehicle showing coverage in the minimum amounts of $300,000 when hauling the permittee's own manufactured home. If hauling for hire, a permittee must carry a minimum amount of $750,000 insurance coverage and have proper authority. When hauling buildings 14' or more in width shall be required to carry evidence of insurance in the permitted vehicle in the same minimum amounts as is required for those permits issued for the movement of overwidth manufactured homes. When operating under a special permit for extra-length, excess weight, up to 129,000 lbs vehicle combination permits, the combination must be covered by insurance of not less than $500,000 combined single limit. The permittee or driver of the permitted vehicle combination must carry in the vehicle evidence of insurance written by an authorized insurer to certify that insurance in this minimum amount is currently in force.

Available Permits and Fees

Overdimension
Permit Period	Conditions	Fee
Single Trip	Oversize only	$33
2-trips	Oversize only	$36
Annual	Oversize non-reducible	$45
Single Trip	Oversize exceeding 16' wide, 16' high, or 110' long	$33
2-trips within 7-days	Oversize exceeding 16' wide, 16' high, or 110' long	$33
Overweight
Permit Period	Conditions	Fee
Annual	East port/Canadian weight	$45
Overdimension and/or Overweight
Permit Period	Conditions	Fee
Single Trip	Overweight/oversize (non-reducible) • Issued for non-reducible vehicles and/or loads that exceed legal axle weights and/or 80,000 lbs, or • Non-reducible oversize vehicles and/or loads	$33 + road use
2-trips		$33 + road use
Annual		$128 + quarterly mileage
Annual	Reducible Loads • Round hay bales • Kiln lumber stacks • Permit for excess height reducible	$45
Annual	Emergency removal of disabled vehicles Issued to heavy duty wrecker trucks or other vehicles used for the removal and secondary movement of disabled trucks and/or trailers or combinations and their unladen return	$45
Annual	Oversize or oversize/overweight Snowplow	$45
Single Trip	Overweight/oversize exceeding 16' wide, 16' high, or 110' long	$33 + road use
2-trips		$33 + road use
129,000 Pound registration permit
Trip	Up to 120 hours	$50
30 day	Extra-length/excess weight up to 129,000 lbs vehicle combinations	$350
Special fees
Permit Period	Conditions	Fee
Annual	Electronic Issuance/ Renewal savings	-$5
Annual	Hardship	$45
Any	Off- route	$28
Any	Re-issuance or transfer fee	$15
Any	Traffic control plan	Actual costs
Road Use Fees
No. Axels	Conditions
2	Col 1. - 40,001 lbs
3	Col 1. - 54,001 lbs
4	Col 1. - 68,001 lbs
5	Col 1. - 80,001 lbs, Col 2. - 131,000
6	Col 1. - 97,001 lbs, Col 2. - 148,001
7	Col 1. - 114,001 lbs, Col 2. - 165,001
Col. 1	Permit fees for column 1 start at $.04 per mile and increase $.04 per mile for each additional 2,000 lbs increment up to the weight indicated in column 2.
Col. 2	Permit fees for column 2 start at $1.02 per mile and increase $.07 per mile for each additional 2,000 lbs increment.

Super loads - Idaho

Permit Limitations

Permit limitations
Width	Limitation
Non-Reducible	Permits may be issued for 10' wide trailers hauling non-reducible loads smaller than 10'wide.
Height	Limitation
Reducible	Loads up to 14' up to 14' 9" on designated highways, vehicle height must not exceed 14'.
Length	Limitations
Reducible	• Vehicle combinations may not consist of more than four units and may not exceed 115' overall length • No such vehicle combination may include more than three cargo units • A full truck and full trailer may have an overall length exceeding 75' up to 85' including load overhang • In any extra-length combination, the loading of any trailer cannot be substantially greater (more than 4,000 lbs) than the weight of any trailer located ahead of it.
Brown routes	Combinations not exceeding 95' in overall length including load overhang, plus 5' 6" off track.
Black routes	Interstate system routes and specified interchanges providing access to approved breakdown areas located in close proximity to the Interstate system. Off-tracking may exceed 6' 6" but cannot exceed 8' 9".
Magenta routes	Combinations of vehicles not exceeding 115' in overall length including load overhang, plus 6' 6" off track.
Weight	Limitations
All	The gross vehicle weight allowable by overweight permit is subject to the seasonal stability of the roadway and the capacity of the structures on the route of travel.
Red routes	Contain posted bridges and require approval or analysis from the Department. A vehicle configuration may be issued an annual overweight/oversize permit for travel on red routes only, upon completion of an analysis verifying the requested weights are acceptable. The annual permit will be issued for a specific vehicle configuration, operating on a specific route, at specific weights. All information will be listed on the annual permit and will be subject to revocation at such time the vehicle configuration changes (such as axle spacings), the approved weights change, or a bridge rating changes. Annual permits issued for red routes will be in addition to the annual permit required for other routes.
Yellow routes	Based on a single axle loading of 22,500 lbs, a tandem axle loading of 38,000 lbs, and a tridem axle loading of 48,000 lbs or the equivalent loading as determined by spacings and number of axles and computed by applying the formula W = 560 ((LN/N-1) + 12N + 36).
Orange routes	Based on a single axle loading of 24,000 lbs, a tandem axle loading of 41,000 lbs, and a tridem axle loading of 51,500 lbs or the equivalent loading as determined by spacings and number of axles and computed by applying the formula W = 600 ((LN/N-1) + 12N + 36).
Green routes	The green overweight level is based on a single axle loading of 25,500 lbs, a tandem axle loading of 43,500 lbs, and a tridem axle loading of 54,500 lbs or the equivalent loading as determined by spacings and number of axles and computed by applying the formula W = 640 ((LN/N-1) + 12N + 36).
Blue routes	Based on a single axle loading of 27,000 lbs, a tandem axle loading of 46,000 lbs, and a tridem axle loading of 57,500 lbs or the equivalent loading as determined by spacings and number of axles and computed by applying the formula W = 675 ((LN/N-1) + 12N + 36).
Purple routes	Based on a single axle loading of 30,000 lbs, a tandem axle loading of 51,500 lbs, and a tridem axle loading of 64,500 lbs or the equivalent loading as determined by spacings and number of axles and computed by applying the formula W = 755 ((LN/N-1) + 12N + 36).
Black routes	Based on a single axle loading of 33,000, lbs a tandem axle loading of 56,000 lbs, and a tridem axle loading of 70,500 lbs or the equivalent loading as determined by spacings and number of axles and computed by applying the formula W = 825 ((LN/N-1) + 12N + 36).
Manufactured Housing	• 16' in width at the base and 18' overall width including the eaves, 80' in length (including tongue) • There are minimum requirements for a vehicle towing an oversize mobile home which vary in relation to the size category of the unit being transported

Signs

General sign requirement	Signs must be displayed on all vehicles and/or loads exceeding legal width or vehicle combinations inclusive of loads that exceed 75'. Signs cannot be displayed when the vehicle is empty and of legal dimensions. Signs need to be displayed on the front or the roof top of the towing vehicle and the rear of the oversize load. The signs must be displayed on the front and back or the roof top of self-propelled oversize vehicles.
Escort sign requirement	All pilot/escort vehicles while escorting an oversize load must display a sign on the roof top of the vehicle. The signs cannot be displayed and will be considered illegal except when the pilot/escort vehicle is actually piloting/escorting an oversize load.
	Type	Size	Lettering	Background
General signs	OVERSIZE LOAD	5'x12"	8" black lettering with a 1" brushstroke	Yellow
Escort signs	OVERSIZE LOAD	5'x12"	8" black lettering with a 1" brushstroke	Yellow

Lights

General light requirements	In addition to those clearance lights required on legal size vehicles, over dimensional vehicles and/or loads traveling during hours of darkness are required to display lights to mark the extremities of the vehicle and/or load.
Escort light requirements	Warning lights required to be on at all times during escorting movements. The pilot/escort vehicle’s headlights and taillights must be on while escorting the permitted load.
	Type	Placement
General light type and placement	Visible from a minimum of 500' may be flashing or steady burning	• Amber lights visible from the front of the oversized vehicle and/or loads and the extremities in the middle or near the front of the oversized vehicle and/or load • Red lights visible from the back of the oversized vehicle and/or load and the extremities near the back of the oversized vehicle and/or load • Rear overhang: Lights are required when rear overhang exceeds the end of the trailer by 4' or more. If the overhang is 2' wide or less only a single light is required on the end of the overhang. If the overhang is over 2' wide, then two lights are required on the end of the overhang to show the maximum width of the overhang.
Escort light type and placement	Flashing or rotating amber lights	Mounted at each end of the required sign above the roofline of the vehicle and be visible from the front, rear, and sides of the pilot/escort vehicle. Alternatively, may display a rotating or flashing amber beacon visible from a minimum of 500' mounted above the roofline and visible from the front and rear of the pilot/escort vehicle. When light bars are in use they must display amber colored lights meeting the minimum visibility requirements.

Flags

	Type	Size	Placement
General Flags	Red or fluorescent orange	18" square	Placed at the 4 corners and/or extremities of the vehicle and/or load as follows: • Front: Fastened to each front corner of the oversized vehicle and/or load if it exceeds legal width • Rear: Fastened to each rear corner of the oversized vehicle and/or load if it exceeds legal width • Side: Fastened to mark any extremity, when wider than the front or the rear of the vehicle and/or load • Overhang: If the overhang is 2' wide or less a single flag is required on the end of the overhang. If the overhang is over 2' wide, then two flags are required on the end of the overhang indicating the maximum width.
Escort Flags	NS	NS	NS

Escort vehicle markings

Size	Placement	Content
NS	NS	NS

Escort/Flagperson requirements

Escorts

Escorts
Configuration	Requirement
Front pilot/escort	• May precede on sections of highway where the vehicle and/or load cannot travel within its proper travel way lane. • When a disabled vehicle exceeding 10' wide is moved at night.
Rear pilot/escort	When the width of a load obstructs the driver’s view to the rear so they cannot see 200' behind them to communicate with the driver of the permitted load concerning impeded overtaking traffic for the purpose of providing passing opportunity
Third pilot/escort	May be required when the load is of such extreme dimensions for the route of travel as to require holding opposing traffic at turnouts and intersections to provide for passage of the load.
Forest	A pilot/escort vehicle is not required on the first movement from the forest of tree-length logs or poles if the overall length does not exceed 110'. Secondary movements must comply with the requirements stated on the Pilot/Escort Vehicle and Travel Time Requirements map.
Loads over 16’ high	A non-metallic height pole is required in the front of the pilot/escort vehicles.
Spacing	Approximately 1,000' needs to be maintained in rural areas between the piloting/escorting vehicle and any oversize load. This spacing may be reduced in urban areas when necessary to provide traffic control for turning movements.
Convoy	Other than overwidth manufactured homes, office trailers and modular buildings: Up to 4 oversize loads or vehicles between front and rear pilot/escort vehicles. Maximum width: • 14' black routes • 12' 6" red routes Oversize loads which do not individually require a pilot/escort vehicle can travel in convoy without pilot/escort vehicles. Maximum length of units in a convoy is limited to: • 100' on black routes • 75' on red routes • 120' on the interstate system.
Convoy Overwidth manufactured homes, office trailers and modular buildings	Up to 2 oversize loads or vehicles between front and rear pilot/escort vehicles. At no time shall more than 1 manufactured home or office trailer be piloted/escorted by only 1 pilot/escort vehicle. Maximum width: • 14' black routes • 10' red routes Minimum spacing of approximately 1,000' shall be maintained between all units in a convoy except when a pilot/escort is required to control traffic in turning movements. Maximum length of units in a convoy shall be limited to: • 100' on black routes • 75' on red routes • 120' on the interstate system.

Flagpersons

For overheight movements that exceed 16 feet high, flagpersons will be required if it is necessary to stop in the line of traffic to clear an overhead obstruction or if necessary to cross the lane lines because of vertical clearance when crossing structures.

Flagpersons will be required if an overweight vehicle is going to cross over the centerline of a structure, or when necessary to flag other traffic off a structure while the overweight load is crossing.

Escort car/company requirements

Pilot/escort vehicle(s) are to be furnished by the permittee and must be either passenger car(s), truck(s) or vehicles authorized by the Special Permit Office, however may not exceed 16,000 lbs. Truck(s) used as pilot/escort vehicle(s) may not be loaded in such a manner as to cause confusion to the public as to which vehicle is the one under escort. Vehicles towing trailers shall not qualify as pilot/escort vehicles.

A pilot/escort vehicle must carry the following items of equipment when escorting an over dimensional vehicle and/or load:

Standard 18” STOP and SLOW paddle sign;
3 bi-directional emergency reflective triangles;
A minimum of 1 five pound B, C, fire extinguisher;
An ANSI Class 2 or 3 safety vest, shirt, or jacket either orange or yellow, which must be worn by the operator when working out of the vehicle during daylight hours. An ANSI Class3 safety vest, shirt or jacket either orange or yellow, which must be worn by the operator when working out of the vehicle during nighttime hours;
Two additional OVERSIZE LOAD signs for escorted loads meeting the size requirements;
Non-conductive non-destructive height pole with a flexible tip on the front of the pilot/escort vehicle for determining vertical clearances (when required);
Valid driver’s license;
Hardhat;
Flashlight (operable);
First aid kit; and
Two-way radios — On all movements requiring a pilot/escort vehicle, both the towing unit and pilot/escort vehicle(s) must be equipped with two-way radio equipment licensed under FCC regulations and to be adequate to provide communication of ¹/₂ mile separation under conditions normally encountered along the proposed route.

Escort car signs, flags, and lights

All pilot/escort vehicles must display a sign on the roof line of the vehicle having the words OVERSIZE LOAD while escorting an oversize load. Such signs must not be displayed and must be considered illegal except when the pilot/escort vehicle is actually escorting an oversize load.

The sign dimensions must be at least 12” high by 5’ wide, with 8” high letters in 1” stroke width and be black letters on a yellow background.

Flashing or rotating amber lights displayed on the pilot/escort vehicle must be mounted at each end of the required OVERSIZE LOAD sign above the roofline of the vehicle and be visible from the front and rear of the pilot/escort vehicle. These lights must meet the minimum standards outlined under oversize vehicles and/or load lighting requirements.

When light bars are in use they must display amber colored lights meeting the minimum visibility requirements.

The pilot/escort vehicle’s headlights and taillights must be on while escorting the permitted load.

As an alternate, a pilot/escort vehicle may display one rotating or flashing amber beacon visible from a minimum of 500 feet, mounted above the roofline and visible from the front and rear of the pilot/escort vehicle.

Travel restrictions

Daytime	Excessively oversize loads and buildings movements will be restricted to the time of day, or day of the week, when traffic interference will be at a minimum. Oversize vehicles operating under authority of an overlegal special permit which exceeds 7' of front overhang on any vehicle in the combination, are restricted to daylight travel only on 2-lane, 2-way highways. The movement of oversize permitted vehicles or loads which are in excess of 13' in width, may be prohibited from movement on highways on all state and interstate routes within one mile of the city limits that have heavy commuter traffic. Red Routes: Daylight travel until 2 p.m. on Friday or the day before a holiday. Black Routes: Loads not in excess of 10' wide, 100' long or 15' high may travel 24-hours per day, 7-days per week. Loads in excess these dimensions may travel during daylight hours 7-days per week. Interstates: Loads not in excess of 10' wide, 120' long or 15' high may travel 24-hours per day, 7-days per week. Loads in excess these dimensions may travel during daylight hours 7-days per week. Nez Perce - Clearwater Forest have special travel restrictions.
Weekend	Red Routes: No Saturday, no Sunday travel. However, due to low traffic volumes on these routes early in the mornings of Saturday and Sunday, single trip permits may be issued for dawn to 8 a.m. If the movement is not completed by 8 a.m. the permittee will be required to safely park and not proceed until the next day.
Holidays	Red-Coded Routes: No travel for any load after 2 p.m. on the day preceding a holiday or holiday weekend. A holiday weekend occurs as 3-consecutive days, when a designated holiday occurs on a Friday or Monday, or when the designated holiday occurs on a Saturday or Sunday, in which case the preceding Friday or the following Monday is included in the 3-day holiday weekend. Travel may be resumed at dawn on the day following the holiday or holiday weekend. Black-Coded Routes and Interstate Routes: Loads in excess of 10' wide, 100' long or 15' high may not travel after 4:00 p.m. on the day preceding a holiday; travel may be resumed at dawn on the day following the holiday. The following days are designated as holidays: • New Year’s Day • Memorial Day • Independence Day • Labor Day • Thanksgiving and • Christmas
Visibility	Permits will automatically become invalid enroute when: • The Idaho Transportation Department, Idaho State Police or other law enforcement office determines and provides public notice by any available means that a hazardous road condition exists. • The driver reasonably knows that hazardous road conditions exist along route. • Whenever a road is marked “Difficult” on 511 or as having a hazardous condition. • Hazardous road conditions may include but are not limited to: Loss of traction on roadways due to ice, snow or frost, excessive water, or mud; wind over 40mph; the visibility is less than 500' due to snow, rain, smoke, dust, or fog; the roadway becomes obstructed due to snow, water, mud, rocks, or other debris; or when a roadway is subject to a natural disaster, or emergency.

['Size and Weight Limits']

['Oversize and Overweight Movements']

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Oversize and overweight movements - Idaho