Roads are much more efficient with fewer cars.
"If there is limited use, roads are more efficient than rail"
That's probably true as roads tend to cost less per mile than rail and you don't have transfer problems.
When heavily utilized the opposite is true: rail is more efficient than roads.
All over the world they keep rebuilding congestion points only for traffic to increase.
If making public transport cheaper attracts more travelers there will be fewer cars on the road. The money spend on public transport will aso make car travel more efficiënt. Roads will last longer. Fewer upgrades are needed. Cars will last longer. etc
It is hard to picture how many cars it takes to move a train full of people.
> 7.6 percent fewer kilometres travelled by car.
> German cars were recorded to have travelled 582.4 billion kilometers.