A few weeks back my wife and I were walking around the corner of our street on the west side when we noticed that if felt different. On both sides of the street the curbs were parked with cars—our neighbors across the street were having a house party. Typically there are few cars parked on our street, with the consequence that the street feels very wide and cars go speeding down it. But with the street densely parked the drive lanes are narrowed; drivers feel more constrained driving down the street causing them to slow down. Sometimes cars even have to stop to give way to a car going the other way, helping slow traffic on an otherwise quiet residential street with many children and pets. There’s even a name for this kind of street, a “give-way street.”
We saw another example of this phenomena during PVD Fest. The Sunday party in Dexter Training Ground meant that hundreds of cars were parking in the usually vacant on-street parking spaces around the park. Usually Dexter Street and Parade Street feature cars accelerating up the wide drives past a park where children play, but again the parked cars slowed traffic by narrowing the road width, and bonus: put a wall of steel between the moving cars and the sidewalk and park.