Even in a place such as New York City, sidewalks, as the architect John Massengale documented, have been shrunk over the years to make more space for cars. In my own neighborhood, many stretches of sidewalk are the bare minimum of five feet wide. This, per long-standing research, accommodates two pedestrians at once, but begins to fall apart at anything beyond that: two pedestrians encountering one walking in the opposite direction; a kid on a scooter; people stopping to chat. Making matters worse are sidewalk-shrinking obstructions such as trees, light poles, or, most egregious, traffic signs. That same street meanwhile, will dedicate more than 10 feet to an active vehicle-travel lane, as well as two additional lanes of parked vehicles—each larger than the sidewalk itself.
The larger question that Vanderbilt and others address is this: are cities made for cars or people? Is the goal of urban planning to move as many cars as efficiently as possible or to encourage a vibrant streetlife and pedestrian activity?
This also applies to the many residential and suburban areas of the United States. In recent weeks, I have thought about this in my residential neighborhood. There is little room for multiple people. The difference is starker when comparing the sidewalk to the nearby roadway, which easily accommodates two cars passing at 30 mph. And with the size of the residential sidewalk, this forces walkers, runners, and bicyclists either into the grass or, more recently with COVID-19, into the street so that everyone has enough space.
I am guessing various actors would throw up some roadblocks regarding wider sidewalks in residential neighborhoods: they would be more costly to put down, they would take away land from yards, a wider sidewalk is less necessary in normal times (and the rate of sidewalk use does seem up in my locale). But, the way to counter this might be to suggest the sidewalk could expand while the street could shrink. Do we really need such wide residential streets? Would we rather make our neighborhoods more pleasant for cars or people? The American suburbs are tied up with cars and driving but this does not have to always require sacrifice from those who want to walk, run, and bike.