Answer :
Final answer:
Expressway on-ramps allow drivers the necessary space to accelerate and merge safely into freeway traffic. They are crucial for adjusting to highway speeds and are designed to enable smooth transitions from local roads to highways.
Explanation:
Expressway on-ramps allow drivers space to accelerate and merge safely into traffic. This space is key for allowing vehicles to adjust to the highway speeds in a controlled manner. Freeway on-ramps are also essential for traffic engineers to design roadways that facilitate smooth transitions from local roads to higher-speed limited access highways.
In the context of driving dynamics, a typical scenario might involve a car that begins to merge onto a freeway with an initial velocity and then accelerates over a certain distance on the on-ramp. For example, calculating the time it takes for a car to merge into freeway traffic on a 200-m-long ramp, with an initial velocity of 10.0 m/s and an acceleration of 2.00 m/s², would be useful information for traffic engineers to ensure ramps provide sufficient space for drivers to safely merge.
