Idaho frost law restrictions 2021.



2021 Idaho winter frost/spring thaw laws and seasonal weight restrictions.

During the spring months when warmer temperatures cause the road surface to break up and generally deteriorate, the highways most affected are restricted to lower axle weights and speed restrictions.
The District will sign and mark affected state highways the day before the weight and/ or speed restrictions are in effect. The weight and/or
speed restrictions will be enforced the day after the Districts sign and mark the state highway.
On those sections of highways which are posted for legal weight, or to less than legal weight, trucks and buses weighing 10,000 pounds or
more will be restricted to 30 mph in critical areas. Speed zones will be marked with red and yellow markers. A red marker will mean speed
is restricted to 30 mph and a yellow marker will mean that legal speed can be resumed.
For information on operating restrictions for state highways posted for spring breakup limits or to check on a route of travel for construction
restrictions etc., go to 511.Idaho.gov and the trucking page.
It is important for the trucking industry to cooperate and comply with the load and speed limits. If compliance with the load and speed limits
are adhered to, the need for future, more restrictive, limits may be alleviated. Excessive violations may lead to the implementation of more
restrictive limits.

Live map.

This is a excellent reference and resource point for Idaho chain laws and basic seasonal weight restriction information.

 

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions.

 

Illinois State Shipping Regulations for oversize and heavy haul.

2021 Shipping laws and regulations for shipping oversize and over-weight loads in the state of Illinois.

Illinois

The great state of Illinois official seal.

Please share your expertise or knowledge of Illinois state shipping regulations with other visitors below.

Locate specialized trucking companies in Illinois.
Locate pilot car companies in Illinois.
Order oversize trucking permits.



Legal load limits in Illinois.
Illinois DOT legal load size & weight limitations.

Legal Loads.
Length:  65’ overall length maximum.
Width: 8’6” on the interstate and other designated highways, 8’ on non-designated highways.
Weight:  GVW 80,000,  Single 20,000, Tandem 34,000,   Tridem 42,000
Height:  13’6” is the maximum allowed height for legal loads.
Overhang:  3’ front in the front and 3’ off of the rear of the trailer.

Routine oversize shipping, trucking and transport permits.
Oversize and overweight trucking permits that are routinely issued by the state of Illinois.

Length:  Up to 145’ long. Anything longer refer to the superload section below.
Weight:  Single 24,000, tandem: 48,000, tridum: 60,000, Quadem: 60,00 gross, 5 Axles 100,000 lbs., 6 Axles 120,000 lbs., 7 axels: 120,000, 8 axles: 120,000 lbs.
Width: 14’6” (any load over 16′ will require special admin approval before a permit is issued).
Height: 15’ (any load over 16′ tall requires a route survey).

Superload information:
Illinois DOT superload information.

Length: Any load that is longer than 145′ is considered a superload.
Width: Any load that is in excess of 14′ 6″ in width is considered a superload.
Height: Any load that is in excess of 15′ 6″ in height is considered a superload.
Weight: Any load that exceeds 120,000 lbs on any standard axle configuration whether it’s a 6,7 or 8 axle configuration or not is considered a superload.
Overhang: Contact them as this varies depending on the route.
Notes: Spacing between steer and first tandem must be more than 8′ 1″. The spacing before the first axle and the trailer must not exceed 18′ 6″.  All axle spacings combined must not be less than 43′ 6″. Superload permit processing times vary. Expect delays. Before requesting a route you are expected to do as much research on your own as possible. They will refer you to GettingAroundIllinois for construction zones and other closures. 

Permitted travel times and restrictions in Illinois:
Illinois travel times and restrictions for oversize loads.

Travel is permitted from ½ hour before sunrise to ½ hour after sunset  Monday thru Friday and ½ hour before sunrise until 12PM on Saturdays. Loads that are overweight only may travel 24/7 on all days of the week (make certain it is not documented otherwise on your permit before doing so). No travel is permitted on Sundays unless you are below the routine permit standards of no more than 115′ in length, 12′ in width, 13′ 6″ in height (sunrise to sunset rules apply).  No movement is permitted on the major holidays: New Years Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. Travel stops at 12PM on the day before any of these holidays. The Illinois oversize load permit office is closed on MLK Day, Lincoln’s birthday, Washington’s birthday, Columbus Day, Election Day, Veterans Day, and on the day after Thanksgiving. However, travel is not restricted on these days. Always refer to your permit for approved travel times.

Required shipment, truck and trailer markings:
Truck, trailer, and shipment required signs, banners, and flags.

A rotating amber light must remain on at all times mounted on top of the cab and be visible from 360 degrees from a minimum of 500′ in direct sunlight. If your overall length is more than 80′ in length you are required to have one amber light over the cab of the truck and one amber light no more than 10′ from the rear of end or trailer/load at the highest point that is practical. Oversize load signs must be a minimum of 7′ in width x 18″ in height, have a yellow background color with black lettering no less than 10″ in height x 1″ thick – we have recently heard 12″ tall x 2″ thick so please clarify and comment below if you know which is correct. Flags are required at all 4 corners of the load and front of the truck and are to be safety red in color and no less than 18″ square. Shipments over 75′ in length, 10′ in width, or 14′ 6″ in height are required to have signs. Signs must be placed on the front and rear extremities of the truck, trailer, or load.

When pilot cars are required:

Length: If over 110′ in length you are required to have a minimum of 1 pilot car and in some places 2 pilot cars (higher traffic density or certain times of year). If over 145′ (150′ in some very rural areas) in length you are required to have 3 pilot cars –  yes 3. If over 175′ in length a police escort will be required.
Width: Up to 14’6” requires 1 pilot/escort vehicle. Over 16’ requires 2 pilot/escort vehicles. Over 18′ in width will require a police escort. 
Height: Up to 14’ 6” 1 pilot/escort vehicle, over 16’ requires 2 pilot/escort vehicles. Over 18′ in height will require a police escort.
Weight: No requirements as long as you can maintain minimum speeds. However, on bridge moves that require all other vehicle traffic to be removed will require an appropriate number of pilot cars which is a minimum of 2 and possibly 3 with police escort. All areas are different and require evaluation.
Note: If you exceed any two dimensions, then you are required to have an additional pilot car. So if you’re over 14′ 6″ tall and 14′ 6″ wide you would be required to have 2 pilot cars.  

Required pilot car certifications:

Cars, vans, or trucks may be used as long as the gross weight of the pilot car vehicle is rated at no more than 8,000 lbs. Pilot car driver must be 18 years of age minimum with a valid regular driver’s license. Pilot cars must have a rotating or flashing amber light mounted on the top of the vehicle. Must display a red flag at all 4 outermost points of the vehicle and have “OVERSIZE LOAD” signs that are a minimum size of 5′ wide x 12″ tall and have black lettering no less than 8″ in height. Must have radio and be in constant communication with the driver transporting the shipment at all times. Must have $500,000 per occurrence combined insurance that covers property and body.

How to apply for trucking permits:

Illinois Department of Transportation – DOT
Bureau of Traffic, 2300 S Dirksen Parkway
Springfield, IL  62764

Email: dot.permitoffice “at” illinois.gov
General inquiry phone: 217-782-6273
Phone: 217-785-1477 or 800-252-8636 within the state.
Fax: 217-728-3572

Note: Fee varies depending on dimensions and miles traveled. A permit is valid for 5 days.

Hours: from 8 AM until 4:30 PM

Central Time Zone

 

The information contained in these pages is research information primarily for use by oversize and overweight trucking company drivers, dispatchers, and pilot car companies. While every effort is put into maintaining the accuracy of this information you must absolutely verify this information with the Illinois State DOT Permits office before commencing movement.

illinois-state

Montana frost law restrictions.

2021 Montana winter frost/spring thaw laws and seasonal weight restrictions.

Typically seasonal weight restrictions start in December. However, you will need to check with the Montana DOT first if considering travel during the winter months. You can phone them: (406)444-6372 or visit their website for live information: https://www.mdt.mt.gov/travinfo/restrictions.shtml

2021 policy update: load and speed limit.
Special winter permits.

Weight restrictions.

The load limit of any single axle is 8 tons. On any tandem axles is 16 tons or 400 lbs. per inch width of the tire. No single axle may exceed 16,000 lbs. No tandem axles may exceed 32,000 pounds.

Front axle: 600 pounds per inch width of tire will be allowed regardless of the seasonal load limit in effect.

Current closures.

https://www.mdt.mt.gov/travinfo/alerts.shtml

 

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions

Delaware State Shipping Regulations

2021 Delaware state shipping laws, regulations, rules, and limitations for oversize and heavy-haul trucking.

Delaware

The great state of Delaware official seal.

 

 

 

 

Delaware Oversize Shipping Trucking & Transport.


Legal Loads.

Length: 60’ (53’ trailer)
Overhang: 3’ front; 6’ rear (included in legal allowable length)
Weight: GVW  80,000 lbs., or 20,000 lbs. per axle.

Delaware

Routine trucking & transport permits.

Length: 100’
Overhang: over 5’ must be permitted
Weight: GVW 120,000
Width:  14’
Height: 15’

How to apply for oversize and heavy-haul trucking permits.

Delaware Department of Transportation
DMV DELDOT Hauling Permits Section
PO Drawer E, Room 208
Dover, DE  19903

Phone: 302-744-2700
Hours: 8 AM until 4:30 PM
Website: www.osow.deldot.gov
E-mail: haulpermit@state.de.us

Basic Oversize permit is valid for 5 days and costs $10

Pilot Car – Escort Car Requirements.

Width over 12’ requires 1 escort car, over 14’ requires 2 escort cars, over 15’ requires State Police escort.
Length over 100’ requires 1 car, over 110’ requires 2 cars, over 120’ requires State Police escort.
Height: None unless specified on the permit after obtained.

Travel times and restrictions.

Travel is permitted from sunrise to sunset with no weekend travel permitted. Travel is also prohibited on the following holidays: New Years Day, Martin Luther King Day, Presidents Day, Good Friday, Memorial Day, Independence Day, Labor Day, Election Day, Columbus Day, Veterans Day, Thanksgiving Day, and Christmas Day. On days preceding a holiday, day movement must stop at 12 noon. Movement may continue the day following the holiday after 12 noon. Be certain to refer to your oversize or heavy-haul trucking permit for any other instructions.

Cities in Delaware: Arden village, Ardencroft village, Ardentown village, Bear, Bellefonte, Bethany Beach, Bethel, Blades, Bowers, Bridgeville, Brookside, Camden, Cheswold, Claymont, Clayton, Dagsboro, Delaware City, Delmar, Dewey Beach, Dover, Dover Base Housing, Edgemoor, Ellendale, Elsmere, Farmington, Felton, Fenwick Island, Frankford, Frederica, Georgetown, Glasgow, Greenville, Greenwood, Harrington, Hartly, Henlopen Acres, Highland Acres, Hockessin, Houston, Kent Acres, Kenton, Laurel, Leipsic, Lewes, Little Creek, Long Neck, Magnolia, Middletown, Milford, Millsboro, Millville, Milton, Newark, New Castle, Newport, North Star, Ocean View, Odessa, Pike Creek, Rehoboth Beach, Rising Sun-Lebanon, Riverview, Rodney Village, Seaford, Selbyville, Slaughter Beach, Smyrna, South Bethany, Townsend, Viola, Wilmington, Wilmington Manor, Woodside, Woodside East, Wyoming.

 

The information contained in these pages is research information primarily for use by oversize and overweight trucking company drivers, dispatchers, and pilot car companies. While every effort is put into maintaining the accuracy of this information you must absolutely verify this information with the Delaware State DOT Permits office before commencing movement.
delaware-state

Delaware state flag.

Nevada frost law restrictions.

2021 Nevada winter frost/spring thaw laws and seasonal weight restrictions.

Nevada weight restrictions go into effect February 1st and typically last until April 1st. However they are subject to change each year.

Overweight restrictions.

NV-frost-thaw

Nevada frost/thaw map courtesy of NDOT. Click to enlarge.

Seasonal weight restrictions are noted on the above map. For additional information use the link below. General overweight restrictions also apply. Additional permit information is located on the official NDOT website.

Oversize restrictions.

Our research has shown there are no published over dimensional seasonal restrictions. This does not mean they can not be imposed. Carriers should contact the Nevada DOT permit office located in Carson City: 800-552-2127 or direct at: (775) 888-7410. You can also email them questions: OverDimensionalVehiclePermitsOffice@dot.nv.gov

Additional information can be obtained by visiting the Nevada DOT site.

 

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions

2021 frost winter frost laws, thaw laws and weight restrictions.

2021 frost laws, thaw laws and seasonal weight restrictions.

Frost/thaw damages to surface.

Frost/thaw damages to surface.

Learn the details of the winter frost laws, spring thaw laws and seasonal weight restrictions. Details for the USA and Canada by State/Province. Many areas incorporate temporary special weight limits and restrictions (frost or thaw laws) during the winter and spring months of the year. These temporary restrictions are usually referred to as “frost laws” or “thaw laws” and implemented typically during the month or March and April. In some Northern States and Provinces frost laws can still be in effect in July as it’s much colder in the North. Since these restrictions are implemented on a “as needed” basis it is possible many of the official government websites may not have published this temporary restriction in a convenient place as frost laws are also subject to change at any moment based on the temperature of the roads core. You want to be certain to check with the appropriate officials to verify the latest changes in the laws.

2021 United States: Restrictions on winter and spring seasonal weight laws.

Idaho   Iowa   Maine   Michigan   Minnesota    Montana   Nevada    New Hampshire    New York   North Dakota  Pennsylvania    South Dakota    Vermont   Washington    Wisconsin    Wyoming

2021 Canada: Restrictions on winter and spring seasonal weight laws.

Alberta   British Columbia   Manitoba   New Brunswick New Foundland & Labrador  Nova Scotia  Nunavut  Ontario    Prince Edward Island   Quebec    Saskatchewan

Why we have these laws and must protect our roads and highways.

In order to keep the trucking industry operating the Northern US states and Canadian provinces rely on engineers and scientific data to determine which dates frost laws will be in effect. With fairly recent advances in science and technology, data is much more reliable. This helps with the implementation of “Frost Laws” or “Seasonal Weight Restrictions” ensuring they are not implemented to early or late. While no State or Province desires to delay the transportation of goods through their territory it is imperative public assets are protected.

In areas that constantly get negative (ie: -10 below zero) temperatures the amount of damages has forced Northern US States as well as Canadian Provinces to create and enact laws that restrict vehicle weights during the spring and winter months (specifically trucking companies) when the roads and bridges are thawing out. There are all kinds of things that can go wrong with different types of roads and pavements. For example the State of Michigan has implemented permanent frost laws that go into effect during the months of March through May (and in some cases even June). Some routes require legal axle weight limits be decreased by as much as 35%. Some areas and local governments may also limit heavy-haul vehicle speeds to a maximum of 35 miles per hour during frost/thaw law months regardless of posted limits.

Oregon hwy. US 1. Photo courtesy of KDRV.com

One of many examples is in Southern Oregon on old US Highway 1 (which follows the coast line from Mexico to Canada) the road is as much as 16 feet thick as years of pavement (even bricks) has been laid down year after year since the early 1900’s. It should be noted that today’s technology is able to provide us with roads that are flexible due to the engineering of the construction process and the materials used. Excessive weight exerted by overloaded axles (or a weakened supporting base) can cause the pavement to bend or deform. The strength of the road combined with its resistance to bending determines the amount of weight the roadway can handle.

 

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions.

Michigan frost law restrictions.

2021 Michigan winter frost/spring thaw laws and seasonal weight restrictions.

Frost/thaw laws usually go into effect by February. However in many years they have been placed into effect earlier. Use the information and links below for live clarification.

Active permit restriction bulletins.

https://mdotjboss.state.mi.us/APSWB/APBHome.htm?bulletin=active

 

Spring weight restriction bulletins.

https://mdotjboss.state.mi.us/APSWB/searchBySpringWeight.htm?year=2021

Overweight shipments.

No shipment overweight (no matter what axle configuration) is permitted to travel during the spring thaw. It should also be noted some shipments may be required to reduce load weights by 25-35% on state roads during the spring thaw months. If your have more than 11 axles total you will not be permitted to leave or enter Michigan during the spring thaw months.

Oversize shipments.

Any shipment in excess of 14′ in width is not permitted to travel during the spring thaw months.

 

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions.

Iowa frost law restrictions 2021.

2021 Iowa frost laws, seasonal load weight and restrictions.

 

In previous years the general rule seasonal restrictions typically begin around March 15th each year in Iowa. By no means consider this legal advice. Be sure to consult with the Iowa DOT before attempting to travel.

 

Current Iowa route restrictions by Iowa counties map.

Iowa DOT office: 515-237-3264

For more information about Iowa regulations and restrictions try our “Trucking regulations” link below.

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions.

 

2021 Saskatchewan shipping regulations

2021 Saskatchewan shipping laws, regulations, rules for heavy haul and oversize trucking permits.

saskatchewan

Saskatchewan Province official flag.

Please share your knowledge of Saskatchewan Province shipping laws with other visitors below.

Locate oversize, heavy-haul trucking companies and pilot cars.

Saskatchewan oversize, heavy-haul trucking companies and pilot cars for hire:

Saskatchewan pilot cars and truck escorts.
Saskatchewan oversize and heavy-haul trucking companies for hire.
Order Saskatchewan oversize trucking permits.

 

Do I need a trucking permit? Legal load limits.

Saskatchewan maximum load limits until a trucking permit is required.

Legal Loads:
Length: 75 feet (22.86 meters) overall long. Trailer length maximum is 53 feet (16.1544 meters).
Width: 8 feet 6 inches wide (2.5908 meters).
Height: 13 feet 6 inches (4.1148 meters) tall.
Weight: 12,100 pounds (5488.4677 kilograms) on steer axle, 20,200 pounds (9162.5659 kilograms) on a single axle, 37,400 pounds (16964.355 kilograms) on tridem axles.
Overhang: Kingpin settings and trailer wheelbase positions are important.  Call to clarify.

Routine oversize and heavy-haul trucking permits.

These maximum dimensions/weights are considered routine oversize or heavy-haul trucking permits in SK.

Length: Since Saskatchewan Province has no said length restrictions your overall length approval will depend on your proposed route.
Width: No set maximums, depends on routing.
Height: No set maximums, depends on routing.
Weight: Saskatchewan is tough.  No single axles numbers, 48,000 pounds (21772.434 kilograms) on tandem axles, 72,000 pounds (32658.651 kilograms) on tridem axles, if you are over 60,000 pounds (27215.542 kilograms) on tridem axles prepare for a bridge survey as it will probably be required..
Overhang: No set limits, depends on routing.

Saskatchewan superloads.

Requirements for extra heavy or extra legal/dimensional (superloads) in SK.

Typically so we’re not publishing too much information a superload is defined by Saskatchewan Province as any shipment with weights and dimensions that exceed those published above in “Routine Permits”. There are exceptions but everything depends on proposed routing and road/weather conditions and if frost laws are in effect.

Required flags and markers for oversize/heavy-haul shipments loaded onto truck trailers.

Know how to mark your load and what signs are required by your permit.

Lights, flags and markers:
If over 120.078 inches wide (3.05 meters) you will need amber lights for night running and flags for daytime travel.  A WIDELOAD or “D” sign is required for all wideloads over 120.078 inches wide (3.05 meters) however a “OVERSIZE LOAD” banner is NOT allowed.  If you are moving at night any required banners must be illuminated with additional amber light in the center of the rear.  If over 10′ 9″ (3.2766 meters) wide the cab of the tractor must be mounted with an amber light.  If over 82 feet (24.9966 meters) long you MUST have a “D” sign or LONG LOAD banner mounted on the rear.  If not transporting a load you must cover ANY signs.

NOTES:  Lift axles are not permitted.  Flip axles can be used if trailer king pin to center distance is is less than 45′ 5″, the trailer is no longer than 53′ and the load is classified as NON DIVISIBLE.  A tractor wheelbase from the center of the steer axle to the center of the drive axle can not measure over 244″ unless you permit the load with a longer wheelbase AND IF they approve it.  This only applies to oversize permits and overweight will not be eligible.  A tridem drive tractor is NOT recognized by the Province of Saskatchewan except for moves that are large and NON DIVISIBLE, IF a tridem drive tractor IS allowed it MUST have a wheel base of no less than 260″ and no greater than 268″.  A spread axles trailer that has axles spacings of greater than 6′ is considered a single axle for weight calculations and is not allowed to carry more than a combined total weight of 20,000 pounds or 10,000 pounds per axle.  EXCEPT when in the case of when the object being shipped is NOT over 37,500 pounds loaded on the spread.  Please leave Saskatchewan experiences below.  This is a tough Province to get solid numbers out of and our viewers can use your experience to help them.

Will your shipment be delayed do to frost and thaw law restrictions?

Frost and thaw laws constantly change due to weather conditions in Saskatchewan. Find out if there in effect:

Saskatchewan Province does have spring weight restrictions and the roads and highways are dependent on conditions.  These restrictions usually apply to all secondary roads and not main highways.  Overall weight reductions may be imposed in some areas.  Check with Saskatchewan Province permit office for clarification.

Saskatchewan travel times and restrictions.

Make certain you don’t ship oversize or heavy-haul loads during restricted movement hours:

Travel times and restrictions:

Holiday restrictions vary, contact SGI permit office to see if you can travel or not.  Daytime travel only for loads over 82′ in length, 12′ 2″ in width and 16′ in height.  No movement is allowed on Friday after 3:00 pm from July 1 until Labor day.  Night time travel is permitted if under the above maximums but must have amber lights on all 4 outer most corners and reflective sign on rear indicating OVERSIZE or LONG LOAD.

When pilot cars or escort vehicles are required.

Heavy-haul or oversize loads may be required to be accompanied by a escort vehicle or pilot car if:

Length: If load is over 98′ on 2 lanes 1 rear pilot car (escort) is required.  If over 118′ in length 1 front and 2 rear pilot car (escort vehicle) is required.
Width: If a load goes beyond the center line of the road then 1 front escort is required.  If over 16′ 4″ wide you will be required to have 1 front and 1 rear escort.
Height: Up to the permit office depending on route.  If over 17′ 2″ in height you will be required to have a bucket truck travel with you.
Weight: For over weight shipments it looks like an escort vehicle will not be required.
Overhang: Case by case basis.  Contact permit office for clarification.

Pilot car and escort vehicle requirements.

Pilot car or escort vehicle mandatory operator certifications and vehicle requirements:

All pilot cars/escort vehicles must display a bumper or roof mounted “OVERSIZE LOAD” sign visible from both the front and rear of the vehicle. Sign must be at least 5′ long and 12″ in height, yellow in color with black letters no less than 10″ tall and 1 1/2″ in width. Vehicle must have 2 safety flags red or orange in color and be a minimum of 18″ of length and/or height mounted at a 40 to 70 degree angle on all 4 corners of the vehicle. Company identification signs must be placed on both sides of the pilot car (escort vehicle) displaying the name of the company, phone number and be placed on both the left and right hand sides of the vehicle. These signs must be no less that 8″ tall x 12″ wide and identity writing must be plainly legible. Vehicle must be equipped with a horizontally mounted rotating (or strobe) amber colored flashing light which must be visible from a 360 degree angle from a minimum of 500 feet. Vehicles must be equipped with a CB radio or 2-way communication device, 2 – 5 pound fire extinguishers type A, B and C, a sign with the word “STOP” on one side and “SLOW” on the other with dimensions of no less than 18″ in diameter with a minimum of 6″ letters. A red safety colored flag with handle no less than 18″ square, 3 reflective emergency road triangles or 18″ traffic cones, 2 OVERSIZE LOAD banners (yellow with black lettering) and a safety colored (red, orange, yellow or lime green) vest, jacket or shirt (used while directing traffic).

Saskatchewan Province DOT Trucking Information.

Physical address:
SGI
Over-dimensional Trucking Permits
2260 – 11th Avenue
Regina, SK  S4P 0J9

EmailCarrierSafetyPrograms@sgi.sk.ca
Help telephone line: 306-775-6969 or 800-665-7575
Fax: 306-775-6909
Hours: Monday – Friday 8:30 am – 4:30 pm
Central Time Zone.

Click here for the Saskatchewan DOT Website for oversize and over-weight hauling permits.
View Saskatchewan laws – detailed version revised 2010.
Saskatchewan truckers guide.
15771-WD901 Permit Guidelines

Saskatchewan cities serviced.

The information contained in these pages is research information primarily for use by oversize and overweight trucking company drivers, dispatchers and pilot car companies. While every effort is put into maintaining the accuracy of this information you must absolutely verify this information with the Saskatchewan Province DOT Permits office before commencing movement.

 

Saskatchewan Province road & highway conditions.
Saskatchewan Province permit offices.
Saskatchewan pilot car companies.
Saskatchewan trucking companies.
Federal bridge formula.
Frost thaw laws.

 

 

North Dakota frost law restrictions

2020 North Dakota winter frost/spring thaw laws and seasonal weight restrictions.

The North Dakota winter frost and spring thaw laws – seasonal weight restrictions. Seasonal weight restrictions are needed to protect the roads and highways during the winter months (usually between November 1 and April 1 each year but can extend towards the end of May) from being damaged by transporting heavy weights over them. While some of them are closed others remain open with weight limits significantly reduced in order to prevent damages. North Dakota implements protective measures to protect their infrastructure – and for a good reason.

North-Dakota-frost-thaw-map

Example of North Dakota frost and thaw law notification map for active months. Click to view their live version.

Make sure you’re educated on why the restrictions exist.

In most of North Dakota the colder winter temperatures cause the ground to freeze and become brittle. However, the earth underneath it is warmer and typically does not freeze so water exists in the roads aggregate when temperatures are frozen but not in the minus for long periods of time. What this does when large weights are transported over it is causes stress cracks and even buckling. These cracks lead to the deterioration of the road and eventually cause pot-holes as the ambient temperatures rise below thus expanding and pushing upward. The asphalt is then completely separated and a pot hole is created.

North Dakota spring thaw laws.

This is where any damages from driving over the roads during the winter frost months becomes evident. As the outside ambient temperature begins to rise so does the earths core. Since the asphalt is dense it takes it longer to thaw out. This is where buckling starts to take place as the warm earth expands and puts pressure on the asphalt to move upwards. This upward force causes the road to either buckle or pot holes start to develop from the millions of cracks that were created ultimately causing the public property to require maintenance which is a huge burden to the state and tax payers.

So North Dakota implements travel restrictions to prevent this.

With changing temperatures and built-up moisture in the pavement, roads are weakened as spring begins. Putting extra weight on the roads during this critical time can lead to even more issues. To prevent excessive damage to roads and highways, many states have enacted frost laws that go into effect during the early months of spring. These laws are designed to help protect the roads in areas with frigid winters.

Frost laws require that large vehicles carry a reduced load while driving on any posted or restricted roads. Also, heavy vehicles must lower their speed as the change in seasons takes place. This helps to cut down on the road damage that occurs as spring arrives each year

 

LoadPassPermits.com is the notification system for North Dakota road closures.

North Dakota frost law Notification system and travel map.

 

See also:

Tire chain laws.
Tire chain laws by location.
Trucking regulations.
Federal bridge formula.
Exemptions from seasonal restrictions.