I've transported large stuff with my bike mind you, including furnitures and a small tree (in a trailer) and 20 miles is smaller than my longest commute on my bicycle which was 24miles each way.

And that was without electric assist. When I look at the low average speed and time spent in car when I use one in an urban area, it just doesn't make any sense in most cities.

But the safety issue is another story though. Every time I relocated I took that parameter into account before choosing a new place.