"Policy goals" won't be enough to protect bicyclists once the cars start driving themselves. Strong standards will be necessary to govern the interactions between cars and bikes in an autonomous future.
According to this article, the market forces behind large home construction are alive and well. In a process of suburban gentrification, developers purchase older, smaller homes and build "McMansions" in their place.
A new research study out of Switzerland quantifies the disproportionate contribution to greenhouse gas emissions made by large homes and relatively long commutes. In one Swiss town, twenty-one percent of households create 50 percent of the emissions.