I'll create a React-based Route Optimization Component that integrates multiple APIs to provide users with route options scored by travel efficiency and environmental friendliness. Let's break this down into manageable parts and implement the component step by step.

This implementation provides a basic structure for the Route Optimization Component. Here's a breakdown of what we've created:

1. RouteOptimizationComponent: The main component that orchestrates the data fetching and rendering of subcomponents.
2. RouteOptionsPanel: Displays the list of available routes with their scores and information.
3. StreetViewPanel: Shows the Google Street View for a selected route point.
4. API integration files (osrm.ts, tomtom.ts, aqicn.ts): Placeholder implementations for fetching route, traffic, and air quality data.
5. scoring.ts: A utility file with a basic implementation of the composite scoring algorithm.
6. types.ts: TypeScript definitions for the data structures used in the component.

To complete this component and make it fully functional, you'll need to:

1. Implement the actual API calls in the integration files.
2. Add route polylines, markers, and overlays to the Google Map component.
3. Implement dynamic re-routing based on real-time updates.
4. Add user preference controls for adjusting route priorities.
5. Implement proper error handling and loading states.
6. Add responsive styling to ensure the component works well on both desktop and mobile.

Here are some additional steps to consider:

1. Implement caching mechanisms to reduce API calls and improve performance.
2. Add unit tests for the scoring algorithm and API integrations.
3. Implement a feedback mechanism for users to rate their route experience.

To set up and run the component locally:

1. Create a new React project using Create React App or Next.js.

2. Install necessary dependencies:

   npm install @react-google-maps/api axios
3. Copy the component files into your project structure.

4. Create a .env file to store your API keys:

   REACT_APP_GOOGLE_MAPS_API_KEY=your_google_maps_api_key REACT_APP_TOMTOM_API_KEY=your_tomtom_api_key REACT_APP_AQICN_API_KEY=your_aqicn_api_key

5. Use the RouteOptimizationComponent in your main App component, passing in the necessary props:

   <RouteOptimizationComponent apiKeys={{ googleMaps: process.env.REACT_APP_GOOGLE_MAPS_API_KEY, tomTom: process.env.REACT_APP_TOMTOM_API_KEY, aqicn: process.env.REACT_APP_AQICN_API_KEY, }} startPoint={{ lat: 40.7128, lng: -74.0060 }} endPoint={{ lat: 40.7484, lng: -73.9857 }} />

6. Run the development server:

   npm start

This implementation provides a solid foundation for the Route Optimization Component. You can now focus on implementing the specific API integrations, refining the UI, and adding more advanced features like dynamic re-routing and user preferences.

Let's reorganize the project structure and address the error you're encountering. I'll guide you through setting up the project correctly and explain where to add the API keys.

Let's start by creating a new React project using Create React App with TypeScript:

1. Open your terminal and run:

   npx create-react-app route-optimization --template typescript cd route-optimization

2. Install the necessary dependencies:

   npm install @react-google-maps/api axios

Now, let's structure our project and create the necessary files:

Now, to add the API keys:

1. Create a new file in the root of your project called .env:

Replace your_google_maps_api_key, your_tomtom_api_key, and your_aqicn_api_key with your actual API keys.

2. Make sure to add .env to your .gitignore file to avoid committing sensitive information:

With this structure, your application should now work without the file not found error. The API keys are properly loaded from the environment variables in the App.tsx file and passed down to the RouteOptimizationComponent.

To run your application:

1. Make sure you're in the project directory.
2. Run npm start in your terminal.

Your React application should now start, and you should see the Route Optimization Component rendered on the page. Remember that you'll need to implement the actual API calls and refine the UI to make it fully functional.