AI in Traffic Signal Optimization Quiz

Answers and explanations appear as you take the quiz.

1. What is the main limitation of traditional fixed-timing traffic signals?
   • They cannot match unpredictable, changing real-world traffic demand
   • They use too much electricity
   • They require a human operator at all times
   • They only work at night
2. Which machine learning approach is commonly used to learn signal-control policies?
   • Image generation
   • Reinforcement learning
   • Spam filtering
   • Speech synthesis
3. In a reinforcement learning traffic agent, what does the reward typically penalize?
   • The number of lanes at the intersection
   • The color of the cars
   • Accumulated vehicle delay or queue length
   • The time of day
4. Why is coordinating multiple intersections harder than optimizing one?
   • Each intersection uses a different power grid
   • Sensors only work on isolated roads
   • There is no way to measure traffic between intersections
   • Changing one signal affects traffic flow at neighboring intersections
5. What was Google's Project Green Light designed to do?
   • Recommend AI-driven traffic signal timing improvements in cities
   • Build self-driving cars
   • Replace all traffic lights with roundabouts
   • Sell navigation subscriptions
6. What simulation tool is often used to train traffic signal AI agents?
   • A spreadsheet
   • A traffic microsimulator such as SUMO
   • A word processor
   • A weather forecasting model
7. Which observations may form the state of a reinforcement-learning traffic-signal agent?
   • Only the weather forecast
   • The driver’s social-media profile
   • Queue lengths, vehicle counts and the current signal phase
   • The total number of roads in the country
8. What is one benefit of coordinating neighboring signal agents along a corridor?
   • They eliminate the need for sensors
   • They guarantee zero vehicle delay
   • They replace traffic laws with rewards
   • They can form green waves rather than optimize each intersection in isolation