India already use power assisted rickshaws to ease the life of the drivers and promote and expend the use of rickshaws in the cities:
Nowadays, India want to broaden the use of this fantastic invention to help the postal workers:
The drivers can pull the rickshaws with 2 passengers or with a fine amount of postal goods. After the battery is dead, the drivers return to solar charging stations for a fresh set of batteries.
wired.com: Solar Rickshaws Ready for Delhi