The question got me thinking about Lyft and the other new sharing services. It's a potential new supply, but it could also take demand from the established services. San Francisco is out in front, and they're seeing problems from shared vehicles which aren't prepared to accommodate disabilities. But maybe if a local group encouraged residents who own ramp/lift equipped vehicles to participate in a sharing service, it would bring more supply online and promote engagement. Sidecar/Uber is still only available in a few large markets, to there might be space to negotiate as they expand.http://www.sfgate.com/news/article/As-Uber-Lyft-Sidecar-grow-so-do-conce...