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California State Shipping Regulations



California 2021 state shipping laws, regulations , rules and limitations for heavy haul trucking and oversize loads. CA DOT – CALTRANS.

California state shipping regulations.

The great state of California official seal.

Please share your  knowledge of California state shipping regulations with other visitors below.

Heavy haul and oversize trucking companies.

Locate trucking companies and pilot car companies in the state of California:

California heavy haul trucking company directory.
California pilot car company directory.
Order California heavy haul and oversize trucking permits.


Legal load limits.

California DOT legal load size & weight limitations for 18 wheeler semi-trucks:

Length: Many measurements for semitrailers by California DOT seem very short because they’re referring to the distance from the king-pin to the rear axle.  Also certain routes have restrictions on trailer sizes so if you are at any point confused please call the DOT and check California state shipping regulations before traveling. First of all for passenger related vehicles the maximum is 45′ in length overall on approved routes. Semi-trailers: for a single axle semitrailer the maximum length of the trailer allowed is 53′ overall as long as it has two axles. If it has only one axle the maximum trailer length is 38′ overall. The maximum overall legal combination length is 65′ for the heavy haul and oversize sector of the trucking industry however there are additional laws for trucks pulling doubles or triples (dry box) that allows them to max out at 75 feet overall. California also has classifications such as a “STAA” vehicle. You can have a look at green truck dimensions at: Truck Map (.pdf)  for further clarification.
Width: 8′ 6″ is the maximum with allowed to travel on any road in the state of California.
Height: 14′ in the maximum legal height allowed to travel in the state of California.
Weight: 80,000 lbs GVW with no more than 12,500 on a steer axle, 20,000 pounds maximum weight on any single axle, 34,000 pounds maximum on tandem axles and on tridem axle configurations depending on axle spread such as from 10 feet to 10 feet 2 inches (10’2″) tridum is legal at 40,000 pounds. If you feel you are getting close to the legal limits see the section below on “routine trucking permits”.
Overhang: You are allowed 3 feet of front overhang (4 feet for fixed trailers ie; car haulers). Rear overhang is 6′ in most areas but can for sure be no more than 1/3 of the total item being shipped. Be sure to clarify the amount with the California DOT office you are traveling in to make sure. Note: The comment below on vehicle shipping overhang. We welcome your comments below to help others in clarification of rear overhang.

Routine oversize and heavy haul trucking permits.

Oversize and heavy haul trucking permits that are routinely issued by California DOT:

Length: 135 feet in overall length is the maximum length on a routine oversize trucking permit that is issued. All others see “superload” info below or learn more about the California length limitations.
Width: 15′ wide is the maximum width issued by a routine oversize trucking permit in California. All others see “superload” info below or learn more about the California width restrictions.
Height: Under 17′ as anything over that height is required to have a route survey. If your route happened to be a well documented  route you might be able to get away without having to do the route survey but its not likely. Some shipments may be forced to use a lowboy, double drop or otherwise trailer that is purposely lower to the pavement.
Weight: 250,000 pounds maximum (Class C if over or see super loads). Steer axles 12,500 pounds. Single axle; 20,000 pounds, 46,000 pounds on tandem axles, 60,000 pounds on tridum axles. Quadem axles are not recognized  for over weight shipments. Depends upon the axle spacings and tire size. Trunnion: 60,000 pounds. Gross Weights: 5 axles is 112,000 pounds; 6 axles – 117,450; 7 axles 158,000 pounds, 8 axles 181,300 pounds (subject to inspection). The weights depend upon the number of tires combined with the overall distance between each of the axles. Spacings on axles are tricky in this state. The California  DOT permits office will consider a number or factors but primarily bridges. If weights are excessive and trailer capabilities are even close to short of maxing out forget it. Pavement structural and stress testing and results will govern your overall capabilities. Learn more details on California heavy haul weight restrictions.
Overhang: Overhang in the state of California is very detailed depending on amount of front or rear overhang and the route (color; see maps link above). Some shipments may be forced to be loaded onto stretch trailers. See the above folder on left titled “California overhang in depth” for more information.
Notes: The distance between axles is measured to the nearest whole foot. When a portion is six inches you round up to to the nearest foot ie: 8 feet and 6 inches is documented as 9 feet.

California overhang in depth:

California superload information.

Length: If you are over 135′ in length overall you are more than likely going to be classified as a superload in California.
Width: Depending out routing and the number of lanes available on the route but 15′ in some areas would qualify you. Over 17′ in width and you will more than likely be categorized as a superload.
Height: Anything over 18 feet tall will require a route survey. If 18′ feet or over in height you more than likely will be classified as a superload. For detailed information on California maximum height limitations check out the state height limitations and routes.
Weight: Of course heavy haul weights are a huge issue. Anytime your overall GVW is over 80,000 pounds or you exceed any of the above (see routine permits) limitations on length, width or height depending on the route you desire you are subject to be classified as a superload.
Overhang: California is NOT going to let you break the rule of 1/3 (no more than 1/3 of overall length can overhang) and they shouldn’t in our opinion from a general view point. Get your proposed routing together and talk to them and see what you come up with would be our suggestion. 15′ possibly routine. 20′ and you are superload for sure we’d guess.
Notes: Here are some maps for superloads (California calls them “Extralegal” – maybe Arnie came up with that?)that can save you some serious money when you need the information. If you need to hire an expert to take care of your California shipping needs or even consult you we are happy to assist you. Most of the time we can handle your problem over the phone for a reasonable fee but when you need someone in the field we are qualified to assist you.  See consultation.

Permitted travel times & restrictions.

California permitted travel times and restrictions for heavy haul and oversize loads:

Let’s start by clarification of daylight hours; the basic rule is 1/2 hour before sunrise until 1/2 hour after sunset. If you do not require a pilot car/escort vehicle and are not overweight (green chart – over 52,000 lbs. on tandem axles or higher see charts in “superloads” section above) or don’t have anything out of the ordinary going on your travel times are 7 days a week 24 hours a day if you request to do so when you order your permits. The travel times restrictions are loaded so figure this as a rule of thumb (your permit will state your allowed travel times when issued) since this is just for you to get an estimate:

  • No travel from 6 AM until 9 AM in/around Los Angeles, San Diego, Sacramento & San Francisco.
  • No travel from 3 PM until 6 PM in the same areas with a 1 hour variance.

Your physical permit will state your exact allowed travel times when you get it issued and they will be real close to the above examples. There are simply too many variable to list.
Holiday travel:  There is no holiday travel time permitted in California unless you have a special arrangement with Caltrans. The following holidays are observed as no travel days by California state shipping regulations: New Years day, Abraham Lincoln’s birthday, George Washington’s birthday, Memorial day, Independence day, Labor day, Thanksgiving day and Christmas day. If the holiday is in a Friday or a Monday there is no travel permitted during Saturday or Sunday. Never travel without first verifying approval first which will be documented clearly on your permit.

When pilot cars or escorts are required.

Shipments requiring escort vehicles or pilot cars:

Length: If over 100′ in length in the city of Los Angles or Los Angeles county you will be required to have 1 front and 1 rear pilot car/escort. This may be required in other areas as well. If over 120 feet and no longer than 135 feet in length on some routes you will be required to have 1 front and 1 rear pilot car/escort vehicle. If over 135′ in length you will be required to have 1 front and 1 rear escort on any road in the state.
Width: If your shipment is over 12′ wide the “general rule” is you will be required to have 1 front pilot car on 2 lane roads or 1 rear escort on 4 lane roads however note 2 pilot cars are required on some routes. Any shipment in excess of 12 feet should figure on a minimum of 2 pilot cars or escort vehicles.
Height: Once you hit the 18 feet mark in height everything changes. You’ll be required to have a height pole pilot car/escort vehicle and before you even apply for your permit you have to conduct a route survey with the pole set at a minimum of 18 feet and 3 inches (18’3″) as well as a utility company clearance letter. Anything over this height will be required to notify all utility companies in advance of transport.
Weight:  There is little mention of weight restrictions and pilot cars. As with many states if the shipment is able to maintain the minimum required speed limits then a pilot car or escort vehicle may not be required. If your shipment is not able to meet the minimum speed requirements then you will more than likely be required to have at minimum 1 front and 1 rear pilot car/escort vehicle and in some cases may even be required to have a police escort. This is based entirely on your proposed route, the weight of the heavy haul shipment and ultimately the California heavy haul permit department.
Overhang: It all depends on the route. Just as a basic rule to calculate off of (not legally binding) if you have less than 15′ of rear overhang you are probably not going to be required to have a pilot car. If you are dealing with a shipment that has 20′ – 25′ of overhang then yes you are going to be required to have at least 1 pilot car/escort vehicle – if overhang is in the front then lead and if off of rear chase. If you have both front and rear overhang that is in excess (30′ front and 25′ rear) count on being required to have 1 front and 1 rear pilot car/escort vehicle.
Notes: Keep in mind these are basic rules for oversize and heavy haul trucking in California. California state shipping regulations continuously change due to construction, project completions and policy modifications. Always refer to your oversize trucking permit before traveling.

Pilot car and escort vehicle certifications.

Pilot car (escort vehicle) certifications and requirements for operating in California state:

Pilot car (escort vehicles) are required to have a minimum of one flashing or strobing amber light mounted at the highest point if the vehicle. Light must be visible from 360 degrees from a distance of no less than 500′ and be completely covered when not tending a shipment. Pilot car vehicles must be equipped with a CB radio or a 2 way communication device with a range of no less than 15 miles and be in constant communication with all parties related to the shipment at all times while in transit. Vehicle is required to have identification signs on each side of the vehicle stating the company name, address and contact telephone number. Vehicle must be equipped with the appropriate banner/sign stating ‘OVERSIZE”, with “OVERSIZE LOAD”, “WIDELOAD” and “LONG LOAD” being used when appropriate that is a minimum of 5’ in width and 10″ in height with black lettering no less than 1 5/8″ letter thickness and a yellow background mounted no less than 48″ from the pavement surface. If not tending a shipment this sign must be fully covered or removed. Vehicle must have one safety colored red flag mounted on each side of the vehicle with a minimum distance of 16″ in either direction. Vehicles must also be equipped with a hand held sign with the words “stop” on one side and “slow on the other, a emergency colored vest/shirt/jacket with reflective stripe and a red emergency flag of no less than 24” in either direction.
Note: Inour professional opinion all pilot cars and escort vehicle operators have items in addition to the above:  2 – 5 pound fire extinguishers type A, B and C, 3 reflective emergency road triangles or 18″ traffic cones, 8 burning road flares, 2 OVERSIZE LOAD banners (yellow with black lettering) and a hard hat. Also when working in California you want to make sure you have the pilot car maps.

Shipment, truck and trailer flags, lights and markings.

Truck, trailer and shipment required signs, banners and flags:

All trucking companies that are hauling oversize and overweight shipments must have a amber colored strobing or flashing light affixed to the top of the tractor trailer cab that is visible 360 degrees from a minimum distance of 500′. Signs that state the exact nature of the shipment; “WIDELOAD”, “OVERSIZE LOAD”, “LONG LOAD”, “EXCESSIVE FRONT OVERHANG”, “EXCESSIVE REAR OVERHANG”. If the shipment is over 100′ overall then the “LONG LOAD” sigh shall be displayed and the “OVERSIZE LOAD” sign is to be displayed for lesser lengths and other oversize configurations. The other signs will need to be used when appropriate. When shipping ANYTHING in excess of 80′ in length, 102″ in width or more than 10′ of overhang you MUST have the appropriate sign on the front of the tractor trailer and on the rear of the trailer and/or rear of overall shipment. The signs must have lettering that is a minimum of 10″ in height with a minimum of 1 5/8″ letter thickness with lettering being black in color on a yellow background. All shipments that are in excess of the 102″ must also have safety colored red flags placed on all for corners of the shipment that are no less than 16″ in either direction. Overhang must be flagged as well.  California law defines daylight time as 1/2 hour before sunrise and 1/2 hour after sunset which leaves you open for trouble on lighting which states that during the hours of darkness (we’ve got a 1/2 hour of lee-way time here) you must have 2 red lights on the side and rear (visible from a minimum of 500′) attached to the load or extremities. So, as soon as you pull out in the AM or if it gets close to dusk pull over and put on the red lights so you don’t find yourself in court trying to argue their error in defining “daylight hours” as it is a contradiction that our legal beagles caught while perusing their endless piles of regulations.

California DOT and other information.

California DOT (Caltrans) contact information and other helpful links:

Contact information:
Northern region:
California Department of Transportation – Caltrans
PO Box 942874, room 4105
Sacramento, CA 94274-0001
Telephone help line:
916-322-1297
Fax line:
916-322-4966
Permit office hours:
8 AM until 5 PM – PACIFIC TIME ZONE

Southern region:
California Department of Transportation – Caltrans
464 West 4th Street, MS #618
San Bernadino, CA  92401
Telephone help line:
909-383-4637
Fax line: 909-388-7001
Permit office hours: 8 AM until 5 PM – PACIFIC TIME ZONE

Caltrans pilot car maps – PILOT CARS LOOK!
Caltrans oversize, overweight and single trip permits here.
Caltrans oversize and overweight shipping manuals.
Loads of contacts inside of the Caltrans oversize permit offices.
California traffic and road conditions reports.

California state shipping regulations.

California DOT and Caltrans regulations for oversize trucking and heavy haul.

California state flag.

Cities we service in California:

 

Additional info.

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 California DOT (Caltrans) Permits office before commencing movement.
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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.

 

 

South Carolina State Shipping Regulations

South Carolina DOT shipping regulations for oversize and overweight trucking on state highway and roads.

South Carolina shipping regulations.

The great state of South Carolina official seal.

Please share your expertise or knowledge with others visitors below.

Trucking company & pilot car directory.
Locate trucking companies and pilot car companies in South Carolina state:

South Carolina trucking company directory.
South Carolina pilot car company directory.

Legal load limits.
Legal load sizes and weights:

Length: 60′ is the overall maximum length allowed without a permit.
Width: 8′ 6″ in the maximum legal width allowed to travel on state roads.
Height: 13′ 6″ is the maximum legal height allowed to travel without a permit.
Weight: 80,000 lbs maximum GVW is the maximum weight permitted to travel without a permit.
Overhang: 3′ in the front and 6′ in the rear is the maximum permitted overhang for legal travel.

Routine trucking permits.
Trucking permits for overweight and oversize loads that are handled on a daily basis:

Length: 125′ in length pretty much is the maximum for routing permits. 100′ in length is the maximum on mobile homes. Overhang see; escort requirements below but the maximum is about 15′ in length.
Width: 16′ in width is the maximum allowed on a routine permit. Over this width depending on routing and you may become a superload.
Height: 16′ in height is about the maximum. Anything over 16′ in height and you start to run into trouble. Any shipment that is over 16′ in height will be required to have a route survey done prior to getting a permit issued. Also your routing requires that the overall height of your shipment is a minimum of 6″ less that any obstructions on the route in order to get that route approved routinely.
Weight: Single axle maximum weight: 20,000 lbs, tandem axle maximum weight is 40,000 lbs, tridum axle maximum weight is 50,000 lbs, quadem axle maximum weight is 70,000 lbs, 5 axle maximum weight is 90,000 lbs, 6 axle maximum weight is 110,000 lbs, 7 axle maximum weight is 130,000 lbs. Anything over 130,000 lbs in weight is a superload and will need to have a bridge analysis done. See superload section below.
Overhang: 3′ in the front and 15′ of rear overhang is about all you are going to get. You can call for more information but expect trouble.
Notes: South Carolina DOT is pretty tough on shipments that exceed any of these weight/dimensions. So if you are a boat shipper you’d better figure out a way to cut that fly-bridge off, sorry and don’t shoot the messenger.

Superload information.
We have the following information available on superloads:

As far as length goes you can get some play as long as your routing keeps you away from historic areas. Width is the same thing with traffic density and population considered. Height is big trouble with the South Carolina DOT. You will be required to have a pilot car with you at all times if you are over 16′ in height for sure. Count on a full route survey for shipments over the 16′ in height and remember that they are NOT going to want to let you travel ANY route where the clearance is less than the required 6″ overage in height. So if you are 18′ in height then the obstruction on the proposed route needs to be a minimum of 18′ 6″ in height or you are going to have delays in getting your permit. Weight is a serious issue if you want to cross over ANY bridges so if your shipment is over 130,000 lbs in overall gross weight get ready for bridge studies and time delays. Our suggestion: examine routing alternatives. Overhang is a rare issue but when it comes up and you are wanting to overhang in excess of 15′ you are going to have trouble. This is the case anytime you want to exceed the basic rule which is more than 1/3 of the overall shipment length; you just don’t do it as it’s too dangerous and the South Carolina DOT knows it.

Permitted travel times and restrictions.
Permitted travel times and restrictions:

The 1 half hour after sunrise and 1 half hour before sunset rule applies. Travel is permitted Monday through Saturday with no travel permitted on Sundays. It is possible to get Sunday travel approved but the basic rule is “no travel on Sundays“. If you are allowed to travel on a Sunday it will be clearly stated on your travel permit.  You may not travel on the following holidays: New Years day, Independence day, Labor day, Memorial day, Thanksgiving day and Christmas day. You may not travel past 12 noon on the day previous of the holiday day and until after 12 noon on the day after the holiday. In high traffic density areas you are not allowed to travel from 7 AM -9 Am and 3 PM – 6PM if you are in excess of 14′ in width. If you are 16′ in width or over, on Saturdays you are only permitted to travel between the hours of 9 AM and 3 PM with no travel before or after permitted in any locations.

When pilot cars are required.
A pilot car (escort vehicle) is required when:

Length: Length is tricky in South Carolina, call the DOT to make sure. Leave your comments below for others please.
Width: From 12′ to 14′ in width will require 1 front pilot car (escort vehicle) on 2 lane roads. 14′ to 16′ in width will require 1 front and 1 rear pilot car (escort vehicle) on all roads in the state. If your shipment is over 16′ in width you will be required to have 3 pilot cars (escort vehicles) 1 front, 1 rear and 1 police escort in the rear.
Height: It all depends on your routing. You could be required to have a pilot car (escort vehicle) with a height pole the entire trip if you are 13′ 7″  (seriously). Please share your expertise with others below.
Weight: If you are approved for weight and able to maintain the minimum speed requirements the South Carolina DOT permit office will probably not require you to have a pilot car (escort vehicle).
Overhang: If your pulling a 48′ or a 53′ (just to clarify) long trailer and you have less than 15′ of overhang you can probably get away with flagging or amber lighting your shipment instead of a rear pilot car (escort vehicle). Anything over the 15′ mark and forget it you will be required to have a pilot car (escort vehicle).

Pilot car certifications.
Pilot car (escort vehicle) certifications & requirements:

The South Carolina DOT is pretty relaxed on pilot cars. You are required to have the proper banner/sign stating “OVERSIZE LOAD” or “WIDELOAD” displayed either prominently on the top of the vehicle or on the front of lead vehicles or rear of chase vehicles. You must have a flashing or strobing amber light on the top of the vehicle that is visible from 360 degrees from a distance of no less than 500′. You are required to have a CB radio or 2 way communication device and be in communication with all drivers working on your shipment. You are required to have your headlights turned on while working.

Note: It is only our professional opinion that pilot cars also have a minimum of the additional items but not required:  2 – 5 pound fire extinguishers type A, B and C, a paddle 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 a handle no less than 18″ square, 3 reflective emergency road triangles or 18″ traffic cones, 8 burning road flares, 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).

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

Amber lights: you are required to have 1 rotating or strobing rear amber light on any vehicle that is  shipping a load in excess of 12′ in width. Flags in safety colored orange or red with a minimum length in any direction of 12″ must be mounted on the 4 outer most corners of the entire overall shipment. Banner signs stating “OVERSIZE LOAD” OR “WIDELOAD” must be placed on the rear and front of the overall shipment. Banner signs must have a letter height of no less than 12′ and have a letter thickness of no less than 1 1/2″. Banner signs must have a yellow background with black lettering.

South Carolina DOT & information.
South Carolina DOT contact and other useful information:

Address:
South Carolina Department of Transportation – DOT
PO Box 191
Columbia, SC  39202

Telephone help line: 803-737-6769
Fax number: 803-737-2199
Hours of operation: 8 AM until 4:30 PM Monday thru Friday – EASTERN TIME ZONE.
South Carolina DOT oversize/overweight information website.
South Carolina DOT road closures and conditions reports.
South Carolina guidelines for movement of oversize and overweight loads.
South Carolina do it yourself single trip permit application – warning you can loose your money if you are not trained.

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 South Carolina State DOT Permits office before commencing movement.
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South Carolina DOT regulations.

South Carolina state flag.