The history of BART pretty much shows that&#x27;s politically infeasible.  Take a look at the original planned map for BART sometime if you want to get really depressed: <a href="http:&#x2F;&#x2F;www.jakecoolidgecartography.com&#x2F;regional-rapid-transit-bay-area.html" rel="nofollow">http:&#x2F;&#x2F;www.jakecoolidgecartography.com&#x2F;regional-rapid-transi...</a>