In this time, I will talk about another sustainable “electric vehicle” which you can carry in hand, boosted board. Boosted boards are a souped-up version of a skateboard that runs on a tiny motor, powerful enough to take you up the famous hills of San Francisco at 10 miles per hour (around 16.1km/h). The boosted board can reach the top speed at 20 miles per hour (around 32.2km/h). It weighs 4 pounds (1.8kg). And its battery has a range of 6 miles. It has regenerative braking to allow you to stop easily and recharge the battery at the same time.
As said in the video, when you get off the public transportation system, such as train and bus, how do you get along the last mile to your destination? Definitely, boosted board can be a good choice.
Reference: http://blog.ted.com/2013/02/27/an-electric-vehicle-you-can-carry-in-hand-sanjay-dastoor-at-ted2013/
e-bike powertrain efficiency 
That seems to me like a really fun way of travelling (at least when you’re still young 😉 )! But unfortunately not all good things come with good prices. Do you have any idea of the of such an electric longboard?
The price is around $1299.
Here is the website for the product: http://www.boostedboards.com/
Looks like a very cool product. But unfortunately less useful here in Belgium as they discourage use in the rain.
This product I think will grow popular amount boosted board fans. But for children and older it will be hard to manage and become dangerous. In addition for most of people it is cool but not a grateful way of traveling.
Indeed, so I think this option is only young people for short distance.