The answer may be simple, but the question persists: Why can’t MARTA run express trains? I talked with Chief Operating Officer Richard Krisak about the physical limitations that prevent the agency from running a nonstop train from, say, Lindbergh Center south to Hartsfield-Jackson International Airport. Krisak also spoke about MARTA’s plan to improve rail service for air travelers. In our second column, we offer part two of a conversation with State Sen. Brandon Beach, R-Alpharetta, who outlines ways the new transportation bill and increased gas taxes will help Georgia.