As a motorman/train operator on the Lexington Ave line for over 20 years I see two errors in most of the proposed solutions. Longer trains and platforms can't speed up travel on the corridor because of the dwell times each train spends in the station. Longer dwell time means a slower ride because of the amount of people getting on and off at each stop. We actually have expresses about 90 to 120 seconds apart during rush hours. Because of the configuration on the Lexington corridor 1 sick customer or police investigation backs up the whole line from Bowling Green to 125th Street. As for CBTC or ATS , it has been tested in the IRT and has made every train 4,5, and 6 late. It can't really be used when you have such small headways between trains. It appears to be made for the newer subway or light rail systems or even Amtrak, where you have more space between trains and ways to re-route around blockages. As for eliminating whole stations I can assure you that the riding public and the Federal government would never ever allow it. East Siders are looking for more choices, not less. They were cheated out of service that they had over 60 years ago on Second and Third Avenues so I think a FULL line 2nd Ave subway is the only solution.