TeslaNav

A navigation web app optimized for Tesla's in-car browser. Built with Next.js 16 (App Router), React 19, TypeScript 5, and Tailwind CSS 4.

Live at teslanav.com

License: Free for personal, non-commercial use. See LICENSE for details.

Features

• Turn-by-turn navigation powered by Mapbox Directions API
• Real-time Waze alerts (police, accidents, hazards, road closures)
• OSM speed camera overlay
• Satellite and 3D terrain map modes
• GPS track recording and playback (GPX export)
• Offline tile caching via service worker
• Touch-optimized UI designed for Tesla's in-car Chromium browser

Development

Prerequisites

• Bun (package manager)
• A Mapbox account with a public token
• Upstash Redis database
• LocationIQ API key (geocoding)
• Vercel Blob storage token (GPX recording)

Setup

# Clone the repository
git clone https://github.com/your-username/teslanav.com.git
cd teslanav.com

# Install dependencies
bun install

# Copy environment variables
cp .env.example .env.local
# Fill in the required values in .env.local

# Start the development server
bun run dev

Open http://localhost:3000 in your browser.

Add ?dev=true to the URL to enable tile bounds debug overlay and verbose logging.

Commands

bun run dev          # Start dev server (http://localhost:3000)
bun run build        # Production build
bun run start        # Start production server
bun run lint         # Run ESLint
bunx tsc --noEmit    # Type check

Environment Variables

Create a .env.local file with the following:

# Mapbox — map rendering + directions API
# Get your token at https://account.mapbox.com
NEXT_PUBLIC_MAPBOX_TOKEN=pk.eyJ1...

# Upstash Redis — server-side caching and rate limiting
# Create a database at https://console.upstash.com
UPSTASH_REDIS_REST_URL=https://...upstash.io
UPSTASH_REDIS_REST_TOKEN=...

# PostHog — analytics (optional)
# https://posthog.com
NEXT_PUBLIC_POSTHOG_KEY=phc_...
NEXT_PUBLIC_POSTHOG_HOST=https://us.posthog.com

# Vercel Blob — GPX recording storage
# https://vercel.com/docs/storage/vercel-blob
BLOB_READ_WRITE_TOKEN=vercel_blob_...

# LocationIQ — geocoding/search
# Get a free key at https://locationiq.com
LOCATIONIQ_API_KEY=pk....

# Inbound — feedback emails and admin alerts (optional)
# https://inbound.new
INBOUND_API_KEY=...

# Admin dashboard — protects /api/admin/* routes
ADMIN_API_KEY=your-secret-key

Only NEXT_PUBLIC_MAPBOX_TOKEN is strictly required to run the map. Other services degrade gracefully when keys are absent (search, alerts, and recording will not function).

Self-Hosting

Vercel (recommended)

1. Click Deploy and connect your GitHub repository
2. Add all required environment variables in the Vercel dashboard
3. Enable Vercel Blob storage in the Storage tab of your project

Docker / Node

bun run build
bun run start        # Runs on port 3000

Set PORT to override the default port. All environment variables must be available at runtime.

Notes for self-hosters

• Tile proxy: Map tiles route through /api/tiles and are cached in Vercel Blob. If you are not on Vercel, you can skip BLOB_READ_WRITE_TOKEN — tiles will fall back to direct Mapbox requests without caching.
• Rate limits: Waze and OSM Overpass calls are rate-limited per-minute via Redis. Upstash has a free tier sufficient for personal use.
• Admin dashboard: Visit /admin with the ADMIN_API_KEY header (or use the UI) to monitor API usage against monthly limits.

Architecture

app/api/           # Server-side API routes (Next.js Route Handlers)
  directions/      # Mapbox Directions (multi-route)
  geocode/         # LocationIQ forward + reverse geocoding
  waze/            # Waze alerts proxy with Redis cache
  speedcameras/    # OSM Overpass speed camera data
  tiles/           # Mapbox tile proxy with Blob cache
  recording/       # GPX file storage via Vercel Blob
  feedback/        # User feedback emails via Inbound
  admin/usage/     # API usage stats + threshold alerts

components/        # React UI components
hooks/             # Custom React hooks (data fetching, GPS, GPX)
lib/               # Shared utilities (Redis, PostHog, GPX, cn())
types/             # TypeScript interfaces
public/sw.js       # Service worker — offline tile cache

All external API calls go through server-side route handlers to keep API keys off the client. Results are cached in Redis (60 s – 24 h depending on data type) to minimize upstream usage.

Contributing

Pull requests are welcome. Please run bun run lint and bunx tsc --noEmit before submitting. There is no automated test suite — validate changes manually in the browser, ideally in a Tesla browser or a Chromium-based mobile browser in touch emulation mode.

License

This project is licensed under the PolyForm Noncommercial License 1.0.0.

You are free to fork, modify, and use this software for personal, non-commercial purposes (hobby projects, self-hosting for personal use, learning, experimentation). You may not use it to build a competing product, offer it as a service, or use it in any commercial context.