The Sonoma-Marin Area Rail Transit, or SMART Train, will begin full passenger service Friday morning, nine years after voters approved a sales tax to fund the project. The 10-stop train will carry commuters between the Sonoma County Airport in Santa Rosa and downtown San Rafael for fares ranging from $3.50 to $11.50. Plans to enlarge the 43-mile line are already underway and include a 2.1-mile extension from San Rafael to the Larkspur Landing ferry terminal. We discuss what's in store for SMART train riders and the system's impact on the North Bay. And we would like to hear from you -- do you plan on using the SMART train? Why or why not? If you've taken a trial ride with SMART train, what did you think?