Google Transit

Google transit is something new similar to that of Google maps, Google local.

One of the best things about working at Google is a policy known as "20 percent time," which you can read about on our jobs page or in this post. Having the freedom to pursue projects during 20 percent of our work week means engineers can pursue a breadth of unique and interesting ideas without having to wait for anyone else.
Souce: Google Blogs

They have experimented on locale travel policies and launched a tool by which commuters can easily access schedule of public tranasport and plan their short trips and save money and time as they provide you cost of driving. Currently they only offer transit planning for the city of Portland.