I’ve put three car seats across the back of many small cars, including the ones we are considering like the Honda Fit. As long as your seats are reasonably narrow, it’s quite practical. See https://www.lesswrong.com/posts/AgrxwzhkFWwbQrRuz
I’m not sure what you’re thinking about in terms of “safely” and “legally”?
I’ve put three car seats across the back of many small cars, including the ones we are considering like the Honda Fit. As long as your seats are reasonably narrow, it’s quite practical. See https://www.lesswrong.com/posts/AgrxwzhkFWwbQrRuz
I’m not sure what you’re thinking about in terms of “safely” and “legally”?