Measure R was passed in Nov 2008, and increased the Los Angeles County sales tax by 1/2 a cent, from 8.25% to 8.75%. It's supposed to generate close to 40 billion over the next 30 years that goes to transit and roadway projects.
However, some of that money is earmarked for Bike/Ped projects. Check out the LACBC blog for more details.
Anyone of any westside bike projects in the works?