The parking increases were of particular concern for those BART representatives from areas with few other public transport options. In these areas BART riders commute to the station and park there at a rate much higher than in areas with more public transportation options. These representatives were worried that any parking increases would disproportionately affect their constituents. In order to remedy these complaints, the proposal was amended to stipulate that parking increases would go toward access improvements in the more remote stations.
The fare and parking hikes are considered necessary because although BART has come out of the past two years with surpluses, they have many long-term operational projects that experts anticipate will create a shortfall for this coming fiscal year. The additional $410 million in revenue would go towards those projects in an attempt to offset the $10 billion shortfall.
Source:
http://www.sfexaminer.com/local/transportation/2013/02/bart-riders-face-higher-fare-parking-costs