Questions and Answers
What is the maximum height of any vehicle outside of a commercial zone on designated highways?
14 feet
What is the maximum height of any vehicle in a commercial zone?
15 feet
What is the maximum height on all other highways?
13 1/2 feet
What is the maximum width of any vehicle?
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What is the requirement for a city to have commercial zones?
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What is the definition of a commercial zone?
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What is the commercial zone for St. Louis?
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What is the commercial zone for Kansas City?
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What is the maximum length for any single vehicle?
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What is the maximum length for any bus or trackless trolley coach?
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What is the maximum length of a truck-tractor and semi-trailer upon interstates?
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What is the maximum length of truck-tractor and semi-trailer upon all other roads?
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What is the maximum length of truck-tractor, semi-trailer, and trailer combinations on interstates?
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What is the maximum length of truck-tractor, semi-trailer, and trailer combinations on all other roads?
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What is the maximum length of trucks and trailers on interstates?
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What is the maximum length of trucks and trailers on all other roads?
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What is the maximum length of Automobile Transporters and Boat Transporters?
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What is the maximum length for Driveaway Saddle Mount Combinations on interstate highways?
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Motor vehicle carriers may carry loads that extend beyond their legal length limits.
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What are exemptions from size limits (excluding interstate highways)?
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What is the maximum weight on any single axle allowed on interstates?
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What is the maximum weight on any single axle allowed in a commercial zone?
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What is the maximum weight on any single axle allowed on all other routes?
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What is the maximum weight on any tandem axle allowed on interstates?
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What is the maximum weight on any tandem axle allowed on all other routes?
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How is the maximum gross weight allowed determined in a commercial zone?
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Where is 80,000 lbs of maximum gross weight allowed?
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What is the maximum gross weight allowed on interstates, primary, and other designated highways?
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You may apply for an over-dimension or overweight permit.
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What are the requirements to receive an oversize or overweight permit?
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Where is the Missouri Vehicle Route Map available from?
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What does the Missouri Vehicle Route Map show?
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What exceptions exist regarding the Federal Motor Carrier Safety Regulations in Missouri?
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What regulations must a vehicle comply with when transporting hazardous materials?
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Which types of vehicles do not require emergency equipment?
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What emergency equipment must any other commercial motor vehicle used for intra or interstate commerce carry?
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What information must be clearly visible on commercial motor vehicles?
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What is the minimum distance a bus or truck must follow another similar vehicle?
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Under what circumstances may you follow closer than the normal limit in a bus or truck?
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Always stay a ______ distance behind the vehicle in front of you.
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For each 10 feet in length of your vehicle, how should you space yourself from the vehicle in front?
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If you are driving a 40-foot vehicle how much time should you keep between you and the vehicle in front?
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When must you stop before railroad tracks while driving certain vehicles?
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What should you do to prevent any part of a load falling off your vehicle?
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What is off-tracking?
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How do you compensate for off-tracking when turning?
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Which vehicles do not have to stop at weigh stations?
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What should you do to avoid an accident with a tailgater?
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It is better to be tailgated at a low speed than a high speed.
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What should you check to ensure you have enough space over your vehicle?
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What should you consider to ensure the surface will hold the weight of your vehicle?
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What does your acceleration rate depend on?
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What affects your time to cross the road?
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In a long or heavily weighted vehicle, you will need a larger gap to cross the road than you would in?
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Study Notes
Vehicle Height and Width Limitations
- Maximum height of vehicles outside commercial zones on designated highways is 14 feet, including an additional 10 miles.
- Vehicles in commercial zones can be up to 15 feet tall.
- All other highways have a maximum vehicle height of 13.5 feet.
- Maximum width for any vehicle is set at 8.5 feet.
Commercial Zones Definition and Extent
- Commercial zones exist in cities with populations of 75,000 or more.
- The extended commercial zone is one mile beyond city limits, with an additional mile for every 50,000 residents.
- St. Louis commercial zone extends 18 miles beyond city limits.
- Kansas City's commercial zone extends 12 miles and includes Herrisonville.
- Commercial zones for Springfield, St. Joseph, and Columbia extend 2 miles.
Vehicle Length Limitations
- Maximum length for single vehicles is 45 feet.
- Buses and trackless trolley coaches are also limited to 45 feet excluding safety bumpers.
- On interstates and certain designated highways, truck-tractor and semi-trailer can reach a maximum length of 53 feet, while up to 60 feet is allowed on other roads.
- Combinations like truck-tractor, semi-trailer, and additional trailers vary: 28 feet on interstates and designated highways; 65 feet on other roads.
- Automobile Transporters and Boat Transporters can be 75 feet, while special combinations like Driveaway Saddle Mount may reach 97 feet.
Weight Limitations
- Maximum gross weight is generally 80,000 lbs on all highways, barring posted bridge weight limits.
- Single axle limits include 20,000 lbs on interstates, 22,400 lbs in commercial zones, and 22,000 lbs on other routes.
- Tandem axle limits are set at 34,000 lbs on interstates and 36,000 lbs on other roads.
- Maximum gross weight in a commercial zone is determined by multiplying the number of axles by 22,400 lbs.
Over-Dimension and Overweight Permits
- Over-dimension and overweight permits are available and may be applied for.
- Requirements for permits include non-reducible loads, liability insurance, and permit fees.
Emergency Equipment and Regulations
- Certain vehicles licensed for specific weights are exempt from carrying emergency equipment.
- Vehicles over 12,000 lbs must have a fire extinguisher, spare fuses, and a combination of warning devices.
- Commercial motor vehicles must display the owner’s name, address, and other identifying information unless licensed for 36,000 lbs or less.
Safe Driving Distance and Practices
- Maintain a distance of at least 300 feet when following another bus or truck under normal conditions.
- Specific distance rules apply based on vehicle length and conditions; for each 10 feet, at least one second of space should be given.
- If transporting hazardous materials, stop within 15 to 50 feet of railroad tracks.
Cargo Security and Off-Tracking Compensation
- Loads must be secured to prevent them from falling off vehicles.
- Off-tracking refers to the shorter path taken by rear wheels during turns; compensate by starting turns further right or left as necessary.
Weight Concerns on Various Surfaces
- Be cautious of the weight-bearing capacity of surfaces like parking lots, unpaved roads, and construction areas.
- The acceleration rate and time to cross roads are influenced by vehicle weight and length, requiring larger gaps for longer or heavier vehicles.
Tailgating and Safety Measures
- To avoid accidents with tailgaters, slow down and increase the distance to the vehicle ahead without sudden maneuvers.
- It is generally better to be tailgated at lower speeds for safety.
Studying That Suits You
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Description
Test your knowledge of vehicle height and width limits in Missouri with these flashcards. The quiz covers maximum dimensions for vehicles in various zones, including commercial and designated highways. A great resource for anyone preparing for a Class E driver's license in Missouri.
