AWS Certified Machine Learning – Specialty — Question 184

A data scientist is working on a public sector project for an urban traffic system. While studying the traffic patterns, it is clear to the data scientist that the traffic behavior at each light is correlated, subject to a small stochastic error term. The data scientist must model the traffic behavior to analyze the traffic patterns and reduce congestion.
How will the data scientist MOST effectively model the problem?

Answer options

• A. The data scientist should obtain a correlated equilibrium policy by formulating this problem as a multi-agent reinforcement learning problem.
• B. The data scientist should obtain the optimal equilibrium policy by formulating this problem as a single-agent reinforcement learning problem.
• C. Rather than finding an equilibrium policy, the data scientist should obtain accurate predictors of traffic flow by using historical data through a supervised learning approach.
• D. Rather than finding an equilibrium policy, the data scientist should obtain accurate predictors of traffic flow by using unlabeled simulated data representing the new traffic patterns in the city and applying an unsupervised learning approach.

Correct answer: A

Explanation

The correct answer is A because traffic signals interact with each other, making it a multi-agent scenario where correlated equilibrium policies can effectively model the interdependencies. Options B, C, and D do not capture the multi-agent dynamics necessary for accurate traffic modeling, focusing instead on single-agent or predictive approaches that may overlook the correlation between traffic behaviors at different lights.