For example, how do you travel with young children and shopping or with bulky items like a surf board?
The website Inhabit features the Madsen Bucket bike as a solution.
I imagine this solution has its limitations in terms of how far you are likely to want to pedal, what to do in wet or cold weather, terrain and speed. On weekends recreation places different transport demands on the commuter than weekday commuting. Also needing to take two children to different schooling destinations could present quite a predicament for the modern parent – especially if they also needs to be on their way to work in Monday morning peak hour!