mattbradley/dash — reverse-engineered prompt

Build me a browser based self driving car simulator like a small demo I can open and play with in Chrome. I want a 3D road scene where a car plans its path in real time, follows the lane, changes lanes when needed, and avoids both parked obstacles and moving cars.

Please make the motion planning visible, not just the final driving. Show the planned path or lattice ahead of the car, and make it clear when the car is choosing a safer route around something. It should feel like an educational demo of how an autonomous vehicle thinks, with smooth steering and speed changes instead of jerky movement.

Use WebGL and Three.js if that makes sense, and keep it running in the browser without a backend. Add simple controls so I can restart the simulation, toggle debug visuals, and maybe switch between a few traffic scenarios. Look up current docs online if you need to.