Transportation

Getting around depends on more than vehicles. It also relies on engines, roads, fares, and information about when to be where. This category looks at three quieter pieces of that system that changed a great deal while most travelers barely noticed.

Carburetors vs Fuel Injection concerns how an engine mixes fuel and air. Toll Booths vs Electronic Toll Collection asks how payment for road use moved from a stop at a booth to a signal read at speed. Paper Timetables vs Real-Time Transit Apps compares a fixed schedule with live information about vehicles in motion. Each pair shows how measurement and feedback replaced fixed settings and fixed printed promises.