As European cities increasingly ban cars and trucks, delivery by bicycle is growing in popularity. But cargo bikes can only carry so much. That's why Cityshuttle, an urban mobility company, is taking a page from the trucking industry's book. Cityshuttle's ePack is essentially a tractor-trailer arrangement, except the tractor is a pedal-assist electric four-wheeler. The corresponding trailer boasts 4 cubic meters (roughly 140 cubic feet) of cargo space.

The zero-emissions rig is just 900mm (35.4") wide, meaning it can use bike lanes. (Eco-friendly, yes, but I'm guessing this relative lane-hog is going to be a huge annoyance to cyclists.)

The batteries are swappable, meaning the ePack can return to a depot to take on more juice and a newly-loaded trailer without needing to recharge, increasing efficiency. And fleet owners can earn a few extra quid by selling advertising on the trailer's dual displays.

Here's the ePack in action in London:

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