From an April 14, 2008 email message from Ben Rosen to Jim Morris:

I hope someone picks up the cause; I've thrown in the towel. The shattering lack of interest among both employers and governmental agencies was too much for me. It'll take new crusaders to accomplish the mission. I was particularly discouraged by the cold reception accorded effective ride-sharing ideas by the New York City and New York State transportation people with whom I met, not to mention their lack of vision and competence. Now that their baby, congestion pricing, has has crashed and burned, maybe ride-sharing's time will come.