What is the maximum ratio allowable between a flatter radius and a sharper radius of compound curves?

What is the maximum ratio allowable between a flatter radius and a sharper radius of compound curves?

• A. 1:1
• B. 2:1
• C. 3:1
• D. 4:1

Answer: (B)

The maximum allowable ratio between a flatter radius and a sharper radius of compound curves is 2:1. This means that when designing roadways or railways that involve compound curves, the flatter radius can be at most twice the sharper radius. This ratio is significant because it helps maintain a comfortable and safe transition between the two different radii, minimizing lateral acceleration and improving vehicle handling. If the ratio were to exceed this limit, it could result in abrupt changes in curvature that may cause discomfort to drivers or passengers, increase the risk of vehicle instability, or lead to increased wear on vehicles. The 2:1 ratio is often specified in design guidelines to ensure that curves can be navigated smoothly and safely. It takes into account the design speed and other factors influencing vehicle dynamics and safety. Adhering to this ratio ensures that the overall geometry of the roadway or railway remains functional and safe for its intended use.

The maximum allowable ratio between a flatter radius and a sharper radius of compound curves is 2:1. This means that when designing roadways or railways that involve compound curves, the flatter radius can be at most twice the sharper radius.

This ratio is significant because it helps maintain a comfortable and safe transition between the two different radii, minimizing lateral acceleration and improving vehicle handling. If the ratio were to exceed this limit, it could result in abrupt changes in curvature that may cause discomfort to drivers or passengers, increase the risk of vehicle instability, or lead to increased wear on vehicles.

The 2:1 ratio is often specified in design guidelines to ensure that curves can be navigated smoothly and safely. It takes into account the design speed and other factors influencing vehicle dynamics and safety. Adhering to this ratio ensures that the overall geometry of the roadway or railway remains functional and safe for its intended use.