The Double Deck solution allows for duplicate the capacity of a Bus without a great increase in the costs of operation or investment, but it has the disadvantage of generating bottlenecks on the lower floor and the stairs, due to passengers of the upper deck who want to get on and off the bus while in stations.
The proposed solution would make the double deck bus system much more efficient, as it removes its main disadvantage while keeping all its benefits. The system is based in the design of double-deck stations equipped with access doors also at the upper deck, so passengers will be able to access directly to the upper deck of the buses without going through the lower floor and the stairs; therefore buses would have also to be designed with access doors in the upper deck.
The best solution would be to combine it with a Bus Rapid Transport (BRT) system with enclosed bus stops where passengers pay their fares when entering the stations, although it is a flexible system so both buses and stations are also able to operate as standard buses and standard bus stops at off-peak hours or at low density areas.
I submitted a patent application of the idea earlier this year , I also submitted them to the Bombardier YouCity Contest and to the Altran Foundation Spain Awards, it was shortlisted for the final in both contests, but it was not selected as a winner, so now I'm looking for other companies or designers interested in developing the idea.
(https://youcity.bombardier.com/idea.php?id=316)
(http://es.altran-foundation.org/el-premio-de-la-fundacion-en-espana/ganador-2012/finalistas.html)