No, they are replacing cars (who solely look at the road ahead of them) with pedestrians (who are actually using the space and looking around). In fact, there

No, they are replacing cars (who solely look at the road ahead of them) with pedestrians (who are actually using the space and looking around). In fact, there will be more people on the streets. The lack of cars makes it possible to use the spare space for playgrounds, skate parks, outdoor restaurant seating, additional shops, et cetera. And the streets don't suddenly narrow: they are still 70 feet wide, they don't magically turn into tiny alleyways the second you remove car traffic. I can tell you from experience that many well-designed parks are even very busy after nightfall. No reason to feel afraid when there are literally a hundred people within eyesight.