By a 51 to 45 majority, Californians favor high speed rail, according to a Public Policy institute of California poll. (page 17 of pdf) But that majority turns to a minority among likely voters, with only 43 percent supporting high speed rail and 53 percent opposing.
The areas that would benefit from high speed rail were the most in favor. San Franciscans support it by a 57% majority and Los Angelenos with a 54% majority, with the Central Valley almost evenly split.
Asians were most in favor of high speed rail, with 69% in favor. Latinos were also more in favor (56%) than whites, where a 55% majority oppose high speed rail.