Questions and Answers
Which vehicle type should generally be considered for road design in steep and mountainous terrain?
What does the term 'Gross Weight' refer to in road design vehicles?
What does 'Height, Overall' measure in a vehicle?
Which of the following is NOT considered when selecting the vehicle type for road design?
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What is measured by 'Length, Overall' in a vehicle?
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What does the first digit in the vehicle type indicate?
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What is the maximum permissible width for a vehicle?
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What is the maximum length of a truck-tractor semi-trailer combination?
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What does the letter 'S' indicate in the vehicle type notation?
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What is the maximum permissible gross weight of a single axle with dual wheels?
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Study Notes
Scope of Road Design Vehicle Standards
- Applicable to designing road elements, excluding culverts and bridges (governed by IRC Bridge Codes).
- Recognizes three types of commercial vehicles: single unit, semi-trailer, and truck-trailer combinations.
- Vehicle type selection depends on terrain conditions, economic justification, and road importance.
- Roads in steep terrain may focus only on single unit vehicle design, not truck-trailer combinations.
Key Vehicle Definitions
- Axle: Rod or shaft that supports vehicle weight and rotates wheels.
- Gross Weight: Total weight of the vehicle or vehicle combination, including loads.
- Length, Overall: Total longitudinal dimension of the vehicle and any load or holding devices.
- Height, Overall: Total vertical dimension above ground surface, including loads.
- Width, Overall: Total transverse dimension of a vehicle, excluding safety devices.
Vehicle Types Overview
- Types indicated by a combination of digits and letters representing the number of axles and semi-trailer configurations.
- For example, a designation of "2-S2" indicates a two-axle truck-tractor with a tandem-axle semi-trailer.
- Combinations like "2-2" refer to a two-axle truck with a two-axle trailer.
Dimension Regulations
- Maximum vehicle width: 2.5 meters.
- Length for single unit trucks/buses (two or more axles): 11-12 meters.
- Length for truck-tractor semi-trailer combinations (excluding bumpers): 16 meters.
- Length for truck-trailer combinations (excluding bumpers): 18 meters.
Weight Regulations
- Maximum single axle weight: 10.2 tons for dual wheels, 6 tons for single wheels.
- Maximum weight for tandem axles: 18 tons.
- Maximum permissible gross weight defined as the total weight transferred to the road, including vehicle, driver, passengers, and cargo.
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Description
Explore the specifications of road design vehicles in this quiz. Understand the importance of dimensions and weight in road elements, and how they apply to various types of commercial vehicles. This quiz covers the fundamentals of vehicle standards in road design.
