The only place I can ride in 3km is work (school). Hard part is that it's downhill the whole way which means a long slow climb after work with a full backpack and whiny kid. We haven't figured out a way to do our grocery shopping via bike yet. If we're out riding, we really don't want to weigh our road bikes down with trailers etc. However, we are currently a one-car family now and we're doing pretty well saving energy that way.