Kids can play anywhere else when cars are on the road. What's so attractive about playing on a big patch of hard material that gets so hot in the summer you can't touch it without burning yourself? What's wrong with parks and people's yards? I never understood the pining for the days of playing on streets.
When I played baseball growing up, the street was level and hard and so on. The backyard with grass had a steep hill and poor traction, etc. The street in front of my house made a much better baseball field than my steeply sloped, grassy and uneven backyard.
Yet, it was right in front of my house, so I could use the bathroom, get a snack and remained under the watchful eye of my mother, unlike, say, some distant park with a proper baseball field.