Recap - Traffic Light

Part of the Logic & Flow section of Coddy's Dart journey — lesson 62 of 65.

Challenge

Easy

Create a comprehensive traffic light management system that demonstrates your mastery of enums and switch statements. Your task is to build a system that can handle multiple traffic lights and provide appropriate actions for drivers.

Define an enum called TrafficLight with three values: red, yellow, and green
Create a function called getDriverAction that takes a TrafficLight parameter and returns the appropriate action string using a switch statement:
- For TrafficLight.red: return "Stop"
- For TrafficLight.yellow: return "Caution"
- For TrafficLight.green: return "Go"
Create a function called getWaitTime that takes a TrafficLight parameter and returns the wait time in seconds using a switch statement:
- For TrafficLight.red: return 30
- For TrafficLight.yellow: return 3
- For TrafficLight.green: return 25
Create three variables to represent different intersections:
- intersection1 of type TrafficLight set to TrafficLight.red
- intersection2 of type TrafficLight set to TrafficLight.yellow
- intersection3 of type TrafficLight set to TrafficLight.green
For each intersection, print the status in this exact format:
- Intersection 1: Red light - Stop - Wait time: 30 seconds
- Intersection 2: Yellow light - Caution - Wait time: 3 seconds
- Intersection 3: Green light - Go - Wait time: 25 seconds
Simulate a traffic light sequence change by updating intersection1 to TrafficLight.green
Print the updated status: Updated Intersection 1: Green light - Go - Wait time: 25 seconds
Create a summary by printing: Traffic system managing 3 intersections successfully

Your program should demonstrate the power of combining enums with switch statements to create a type-safe, readable traffic management system. The switch statements must handle all enum values and return the exact strings and numbers specified above.

Try it yourself

import 'dart:io';

// TODO: Define your TrafficLight enum here

// TODO: Create your getDriverAction function here

// TODO: Create your getWaitTime function here

void main() {
  // TODO: Write your code below
  
  // Create intersection variables
  
  // Print status for each intersection
  
  // Update intersection1 and print updated status
  
  // Print summary
}