How does using train as transport compared to bus conserve more fuel?

Trains are generally more fuel-efficient than buses due to their ability to carry a larger number of passengers simultaneously, reducing the fuel consumption per person. Additionally, trains often run on dedicated tracks, allowing for smoother and faster travel without the frequent stops and starts typical of bus routes. Their electric or diesel-electric engines can also be more efficient than traditional bus engines, further enhancing fuel conservation. Overall, the efficiency of mass transit through trains minimizes the environmental impact compared to buses.