Of course the road has a benefit, as does the train. But this gets to the central issue: the train doesn't stop at every shop; it stops only at the station. It

Of course the road has a benefit, as does the train. But this gets to the central issue: the train doesn't stop at every shop; it stops only at the station. It gets you very efficiently to the station, and from there you walk to the shop, and there are generally multiple shops at easy walking distance near that station. The road could do that too, but instead, it stops independently at every shop, while simultaneously also trying to be the thoroughfare that gets people from far away. And it's that combination that makes it a lot more complicated and more dangerous. And inefficient. Centralise the stops, and put the stops closer together so you can walk there.