The primary function of a retaining wall is to retain soil at an angle, preventing it from collapsing.

The primary function of a roundabout is to reduce traffic delays by allowing continuous flow of vehicles while minimizing conflict points.

The primary function of a stop sign is to require vehicles to come to a complete stop before proceeding.

The subbase layer provides structural support to the surface layer and helps distribute loads to the subgrade.

The primary function of a traffic roundabout is to reduce the number of conflict points, thereby improving safety.

Admixtures are used to enhance specific properties of concrete, such as workability, setting time, and durability.

The primary function of bricks in construction is to provide structural support, forming walls and other load-bearing elements.

Cement acts as a binding agent that holds the aggregates together in concrete.

Coarse aggregates provide bulk and strength to concrete, making it more durable.

Steel reinforcement is primarily used to enhance the tensile strength of concrete structures, which are weak in tension.

Steel reinforcement is added to concrete to enhance its tensile strength, as concrete is weak in tension.

Traffic signs are primarily designed to provide information and guidance to drivers, ensuring safe and efficient roadway use.

Traffic signs are essential for providing information and guidance to drivers, ensuring safe and efficient roadway use.

Traffic signs are essential for providing information and guidance to drivers, ensuring safe and efficient roadway use.

Traffic signs are primarily designed to inform and guide road users, providing essential information about rules, hazards, and directions.

Fly ash is used in concrete to improve workability, reduce permeability, and enhance durability.

Superplasticizers allow for a reduction in water content while maintaining the desired workability of the concrete.

The primary goal of traffic calming measures is to enhance pedestrian safety by reducing vehicle speeds and improving the overall safety of roadways.

The primary goal of transportation planning is to ensure the efficient and safe movement of people and goods within a region.

Portland cement is primarily made from limestone, which is heated to produce clinker.

Soil sampling is the primary method for site investigation, allowing for the collection of soil samples for laboratory analysis.

Terzaghi's equation is the primary method used for calculating the bearing capacity of shallow foundations.

All of the listed methods (SPT, CPT, and Plate Load Test) are commonly used to determine the bearing capacity of soil in the field.

Terzaghi's theory is the primary method used to estimate settlement due to consolidation in saturated soils.

The primary purpose of a bearing capacity test is to establish the load-bearing capacity of the soil to ensure safe foundation design.

Retaining walls are designed to hold back soil and prevent it from sliding or eroding.

The primary purpose of a roundabout is to improve traffic flow and safety by reducing the number of conflict points and allowing continuous movement.

The primary purpose of a settlement plate is to measure vertical displacement of the ground surface over time, which helps in monitoring settlement.

Sieve analysis is used to classify soil based on the distribution of particle sizes, which is essential for understanding its behavior and suitability for various engineering applications.

The primary purpose of a site investigation is to determine the soil properties and conditions at a site to inform design and construction decisions.