Is San Francisco considering going “Double Decker” for local commute ?

Double Decker buses are vital part of mass transportation for cities like London and Bombay for ages. You travel in them and it's a fun feeling all together. Back home it was the most important means of commute apart from local trains. 

Last year  I was in London and I enjoyed traveling in these buses once again. Interesting part of this commute was hopping on brand new of these puppies from old design buses. Bottom line you got to travel in them to enjoy.

Looks like these double deckers are making their way into mainstream transportation in cities like New York, San Francisco, Seattle.  Which is a shift from being  tourist focus to daily commute. If you consider pure upside of these buses. 

• They can carry twice as many people in the same living/moving area of the bus.  
• Fuel savings; if not 100% , should add to "Save the Earth" effort overall if you calculate per person fuel consumption for a  regular bus vs double decker.

But on the flip side city authorities will have to do some infrastructure changes for these buses to run everywhere. e.g San Francisco overhead live wires for current local transportation needs to be readjusted or redesigned. The most important no-no that might keep the city from pursuing this would be San Francisco's notorious hilly streets. Think about driving these buses up California street or Gough street. Moreover San Francisco has tried these buses on some its routes last year.

New York is already planning to get these double decker's back on selected routes.