This is a reason why buses are not as cheap as they seem at first glance.

Often times, buses are favored because they require low capex (adding lines is easy, politically palatable, etc).

But in practice, on really busy bus lines with high throughput, it shreds the roads, to the point where you really need to re-pave the whole road every 10 years -- in which case, why not just put a rail line in and use a train!

In the mid-90s, Seattle started excavating its bus-stops-on-a-slope and pouring a new concrete foundation, because the busses were warping the asphalt so badly.

I was just back there this last weekend, and you can no longer see any of the concrete - it has all been coated with asphalt. However, I assume its a rather thin layer because none of the bus stops I checked show the signs of damage that were becoming common in 90-96.

Maybe the fact that every car in the US weighs two to three times more as it needs doesn't help either. I'd be curious to get the numbers to see what's worse. A half packed bus every 15 minutes or thousand of pickup trucks.

Yeah looking at any road around me it's obvious which lanes the busses prefer.