# Privacy Policy

**Last Updated: June 2, 2026**

The Congestion Cost Calculator ("we," "us," or "our") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our website.

## 1. Information We Collect

### a. Usage Data
When you visit our website, we automatically collect certain information about your device and how you interact with our site, including:
*   **Session ID**: A unique, temporary identifier to group your interactions during a single visit.
*   **User Agent**: Information about your browser and operating system.
*   **Referrer**: The website you visited before coming to our site.

### b. Calculator Inputs
When you use the calculator, we collect the data you provide to generate your results, such as:
*   ZIP code
*   Commute patterns (days per week, distance)
*   Vehicle and fuel type
*   Estimated costs and time lost

### c. Personal Information (Future Use)
If we offer the option to provide more personal information (such as your name or email) for detailed reports, we will explicitly ask for your consent before collecting this data.

## 2. How We Use Your Information
We use the collected data to:
*   Provide and improve the Congestion Cost Calculator.
*   Analyze website traffic and usage trends.
*   Generate aggregated, anonymous statistics about congestion costs.
*   Develop new features and services.

## 3. Data Storage and Security
We use **Supabase**, a secure backend-as-a-service, to store your data. We implement industry-standard security measures to protect your information from unauthorized access, disclosure, or destruction.

## 4. Third-Party Services
We may use third-party services (like Vercel for hosting and Supabase for data storage) that have their own privacy policies. We encourage you to review them.

## 5. Your Choices
You can choose not to provide certain information, although this may limit your ability to use some features of the calculator.

## 6. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new policy on this page.

## 7. Contact Us
If you have any questions about this Privacy Policy, please contact us through our GitHub repository.