The system you mentioned is being built to supplement this system: [en.m.wikipedia.org
That system is 5'6", Indian gauge. In fact most of India's rails between the major cities is Indian gauge. The fact that some newest systems being built there are SG, does not mean the wider gauge is going away. The sheer costs of changing the whole country to standard would be beyond the national debt of the country.
As for BART, please provide a source that there was collusion between SP and the builder. Still waiting Mouse. You with all of your constant @#$%& have yet to do that.
Please provide who or what will magically give the monies to standard gauge the entire 110 mile system, plus stock. Your daily gripe about BART indicates a warped mind. Maybe you ought to see a doctor....
San Francisco area has more problems than BART being "Bechtel Gauge". Get over it.